Tetra­kis(tri­ethyl­enediamin-1-ium) dodeca-μ2-chlorido-hexakis(thio­cyanato-κN)hexa-octa­hedro-niobate

Sperlich, E.; Köckerling, M.

doi:10.1107/S241431462300398X

metal-organic compounds

IUCrDATA

ISSN: 2414-3146

Volume 8| Part 5| May 2023| x230398

https://doi.org/10.1107/S241431462300398X

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Tetrakis(triethylenediamin-1-ium) dodeca-μ₂-chlorido-hexakis(thiocyanato-κN)hexa-octahedro-niobate

Eric Sperlich ^a and Martin Köckerling ^b ^*

^aUniversität Potsdam, Institut für Chemie, Liebknecht-Str. 24-25, D-14476 Potsdam, Germany, and ^bUniversität Rostock, Institut für Chemie, Anorganische Festkörperchemie, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany
^*Correspondence e-mail: Martin.Koeckerling@uni-rostock.de

Edited by M. Weil, Vienna University of Technology, Austria (Received 4 April 2023; accepted 4 May 2023; online 12 May 2023)

The crystal structure of the cluster complex salt, (C₆H₁₃N₂)₄[Nb₆(NCS)₆Cl₁₂] or (H-DABCO)₄[Nb₆Cl₁₂(NCS)₆] (DABCO = triethylenediamine or 1,4-diazabicyclo[2.2.2]octane), comprises octahedral Nb₆ cluster cores, which are μ₂-coordinated by 12 chloride ligands (bridging the octahedral edges, inner ligand sphere). Furthermore, each Nb atom is N-bonded to a terminal thiocyanate ligand (outer ligand sphere). The discrete clusters carry a charge of −4, which is compensated by four monoprotonated DABCO molecules. These are arranged in rows, which are N—H⋯Cl and N—H⋯N hydrogen bonded to the anions and among each other.

Keywords: crystal structure; niobium; cluster; chloride; DABCO.

CCDC reference: 2260596

Structure description

Cluster complexes with octahedral cores of electron-poor transition metals, exhibiting strong metal–metal bonds, have been investigated for many decades (Braunstein et al., 1999 ; Cotton, 1964 ; Dehnen, 2017 ; Janiak et al., 2012 ; Simon, 1988 ; Vaughan et al., 1950 ). Starting from [Nb₆Cl₁₂(CH₃OH)₄(OCH₃)₂]·DABCO·0.66CH₂Cl₂ (Sperlich & Köckerling, 2021 ), the title compound was obtained by ligand-exchange reactions with thiocyanate salts in methanol. The crystal structure of the title compound consists of discrete [Nb₆Cl₁₂(NCS)₆]⁴⁻ cluster anions and (H-DABCO)⁺ cations. The Nb atoms of the cluster anions are arranged octahedrally. The octahedral edges are μ₂-bridged by Cl⁻ ligands and the exo sites occupied by the N-binding NCS⁻ ligands. Two symmetry-independent cluster units are present in the unit cell. One unit is located at the Wyckoff site 9e with point-group symmetry $[\overline{1}]$ , the other at site 3a with point-group symmetry $[\overline{3}]$ . of the space group R $[\overline{3}]$ . The cations are arranged in N—H⋯Cl and N—H⋯N hydrogen-bonded rows of four protonated DABCO molecules between two cluster units. Two H-DABCO cations (comprising atoms N7, N8, and N9, N10) are situated on a threefold rotation axis, and one H-DABCO cation (comprising N11, N12) is statistically disordered over two sets of sites. The four protons per cationic row are statistically attached to the five possible sites. Selected hydrogen bonds are listed in Table 1. The resulting structural arrangement is shown in Fig. 1. The interatomic distances in the individual cations and anions are found in the expected regions. For both cluster units they are in the range of Nb₆ cluster compounds with 16 cluster-based electrons, in line with the charge of −4. Comparable A₄[Nb₆Cl₁₂(NCS)₆] salts with the same discrete cluster anion have been reported for A = K, Rb, and NH₄ (Reckeweg & Meyer, 1996 ), Ph₄P (Flemming et al., 2009 ), and Cs (Naumov et al., 2003 ). Fig. 2 shows the hexagonal packing of the cluster units with intermediate H-DABCO cations. Starting from compounds with such discrete iso-thiocyanato ligated cluster units, cluster network compounds have already been synthesized (Pigorsch & Köckerling, 2016 ).

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N5—H5N⋯Cl5	1.00	2.46	3.368 (7)	150
N8—H8N⋯N9	1.00	1.80	2.795 (8)	180
N10—H10N⋯Cl7ⁱ	1.00	2.90	3.695 (5)	137
N12A—H12N⋯N6ⁱⁱ	1.00	1.59	2.59 (1)	176
Symmetry codes: (i) ; (ii) $[x-y+{\script{1\over 3}}, x-{\script{1\over 3}}, -z+{\script{2\over 3}}]$ .

Figure 1
The structures of the discrete anionic cluster units and rows of cation units of (H-DABCO)₄[Nb₆Cl₁₂(NCS)₆]. Atoms are drawn with displacement ellipsoids at the 50% probability level. The Nb₆ metal atom octahedron is shown in a polyhedral representation, and N—H⋯N and N—H⋯Cl hydrogen bonds as red dashed lines. Of the disordered parts, only one of each is displayed for better visibility.

Figure 2
Arrangement of cluster anions and (H-DABCO) cations in the unit cell in a view along the crystallographic c axis. The Nb₆ metal atom octahedra are shown in a polyhedral representation.

Synthesis and crystallization

The cluster compound [Nb₆Cl₁₂(CH₃OH)₄(OCH₃)₂]·DABCO·0.66CH₂Cl₂ was used as starting material (Sperlich & Köckerling, 2021). In a glass vial of 4 ml volume, 20 mg (15.56 µmol) of the precursor, 9 mg (93.37 µmol) of potassium thiocyanate, KSCN, 12 mg (157.64 µmol) of ammonium thiocyanate, (NH₄)SCN, and 1 ml of methanol were filled. The vial was placed in a sand bath at 313 K. After one day it was taken out of the sand bath and allowed to stand untouched for several days at room temperature. During this time, the title compound crystallized from the reaction mixture in the form of black crystals (Fig. 3). For analytically pure samples, the crystals were filtered from the solution and were washed with anhydrous ethanol and anhydrous methylene chloride. Yields were up to 80%.

Figure 3
Microscopic view of crystals of (H-DABCO)₄[Nb₆Cl₁₂(NCS)₆].

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2. The sulfur atoms of two thiocyanato groups (S2 and S3) are disordered over two sets of sites, both in a ratio of 0.51 (3):0.49 (3). One of the four H-DABCO units (comprising atoms N11 and N12) is equally disordered over two sets of sites, denoted as A and B.

Table 2
Experimental details

Crystal data
Chemical formula	(C₆H₁₃N₂)₄[Nb₆(NCS)₆Cl₁₂]
M_r	1784.08
Crystal system, space group	Trigonal, R $[\overline{3}]$
Temperature (K)	123
a, c (Å)	25.399 (2), 30.418 (2)
V (Å³)	16993 (3)
Z	12
Radiation type	Mo Kα
μ (mm⁻¹)	1.98
Crystal size (mm)	0.30 × 0.20 × 0.20

Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 )
No. of measured, independent and observed [I > 2σ(I)] reflections	84629, 13784, 11834
R_int	0.040
(sin θ/λ)_max (Å⁻¹)	0.758

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.040, 0.093, 1.09
No. of reflections	13784
No. of parameters	502
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	2.03, −1.79
Computer programs: APEX3 and SAINT (Bruker, 2017 ), SHELXS (Sheldrick, 2008 ), SHELXL (Sheldrick, 2015 ), DIAMOND (Brandenburg & Putz, 2019 ) and publCIF (Westrip, 2010 ).

Structural data

CCDC reference: 2260596

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S241431462300398X/wm4186sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S241431462300398X/wm4186Isup2.hkl

checkCIF report

Computing details top

Data collection: APEX3 (Bruker, 2017); cell refinement: SAINT (Bruker, 2017); data reduction: SAINT (Bruker, 2017); program(s) used to solve structure: SHELXS (Sheldrick, 2008); program(s) used to refine structure: SHELXL (Sheldrick, 2015); molecular graphics: DIAMOND (Brandenburg & Putz, 2019); software used to prepare material for publication: publCIF (Westrip, 2010).

Tetrakis(triethylenediamin-1-ium) dodeca-µ₂-chlorido-hexakis(thiocyanato-κN)hexa-octahedro-niobate top

Crystal data top

(C₆H₁₃N₂)₄[Nb₆(NCS)₆Cl₁₂]	D_x = 2.092 Mg m⁻³
M_r = 1784.08	Mo Kα radiation, λ = 0.71073 Å
Trigonal, R3	Cell parameters from 9867 reflections
a = 25.399 (2) Å	θ = 2.5–32.6°
c = 30.418 (2) Å	µ = 1.98 mm⁻¹
V = 16993 (3) Å³	T = 123 K
Z = 12	Block, black
F(000) = 10512	0.30 × 0.20 × 0.20 mm

Data collection top

Bruker APEXII CCD diffractometer	11834 reflections with I > 2σ(I)
Radiation source: microfocus sealed tube	R_int = 0.040
φ and ω scans	θ_max = 32.6°, θ_min = 1.1°
Absorption correction: multi-scan (SADABS; Krause et al., 2015)	h = −38→38
	k = −38→38
84629 measured reflections	l = −46→46
13784 independent reflections

Refinement top

Refinement on F²	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F² > 2σ(F²)] = 0.040	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.093	H atoms treated by a mixture of independent and constrained refinement
S = 1.09	w = 1/[σ²(F_o²) + (0.020P)² + 223.5098P] where P = (F_o² + 2F_c²)/3
13784 reflections	(Δ/σ)_max = 0.002
502 parameters	Δρ_max = 2.03 e Å⁻³
0 restraints	Δρ_min = −1.79 e Å⁻³

Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Refinement. C-and N-bound hydrogen atoms were placed on idealized positions and refined using a riding models.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
Nb1	0.15274 (2)	0.27928 (2)	0.38766 (2)	0.01794 (5)
Nb2	0.21875 (2)	0.30094 (2)	0.30483 (2)	0.01810 (5)
Nb3	0.24363 (2)	0.40316 (2)	0.36253 (2)	0.01897 (5)
Nb4	0.65963 (2)	0.39594 (2)	0.37251 (2)	0.02176 (6)
Cl1	0.20921 (4)	0.22977 (4)	0.36270 (3)	0.0306 (2)
Cl2	0.24134 (4)	0.35140 (4)	0.43131 (3)	0.0304 (2)
Cl3	0.13796 (4)	0.21431 (3)	0.26443 (3)	0.0296 (2)
Cl4	0.24550 (4)	0.35960 (4)	0.23630 (2)	0.0260 (1)
Cl5	0.31827 (3)	0.37626 (4)	0.33539 (3)	0.0296 (2)
Cl6	0.27439 (3)	0.47858 (3)	0.30297 (3)	0.0271 (1)
Cl7	0.73993 (4)	0.41477 (4)	0.42584 (2)	0.0305 (2)
Cl8	0.72998 (6)	0.48879 (4)	0.33235 (3)	0.0453 (3)
S1	0.17220 (6)	0.16375 (5)	0.50800 (4)	0.0499 (3)
S2B_a	0.3823 (2)	0.2647 (2)	0.2775 (6)	0.065 (2)	0.49 (3)
S2A_b	0.3887 (3)	0.2711 (4)	0.2966 (3)	0.049 (2)	0.51 (3)
S3A_c	0.4484 (1)	0.5661 (4)	0.3962 (4)	0.043 (1)	0.49 (3)
S3B_d	0.4442 (2)	0.5774 (2)	0.3810 (3)	0.035 (1)	0.51 (3)
S4	0.67419 (8)	0.51041 (6)	0.50030 (4)	0.0591 (4)
N1	0.1412 (1)	0.2221 (1)	0.4453 (1)	0.0304 (6)
N2	0.2775 (2)	0.2684 (1)	0.2764 (1)	0.0343 (7)
N3	0.3273 (1)	0.4780 (2)	0.3911 (1)	0.0355 (7)
N4	0.6530 (2)	0.4609 (2)	0.4167 (1)	0.0454 (9)
N5	0.4310 (4)	0.4556 (4)	0.2629 (2)	0.102 (2)
H5N	0.3886	0.4307	0.2745	0.123*
N6	0.5372 (3)	0.5180 (2)	0.2347 (1)	0.062 (1)
N7	0.3333	0.6667	0.2131 (2)	0.0427 (13)
N8	0.3333	0.6667	0.2968 (2)	0.0291 (10)
H8N	0.3333	0.6667	0.3297	0.035*
N9	0.3333	0.6667	0.3887 (2)	0.0270 (9)
N10	0.3333	0.6667	0.4714 (2)	0.0450 (14)
H10N	0.3333	0.6667	0.5043	0.054*
C1	0.1537 (2)	0.1978 (2)	0.4716 (1)	0.0248 (6)
C2	0.3228 (2)	0.2677 (2)	0.2819 (2)	0.045 (1)
C3	0.3772 (2)	0.5172 (2)	0.3901 (1)	0.0341 (7)
C4	0.6618 (2)	0.4819 (2)	0.4516 (1)	0.0365 (8)
C5	0.4472 (5)	0.5205 (5)	0.2635 (3)	0.126 (4)
H5A	0.4258	0.5292	0.2399	0.151*
H5B	0.4370	0.5316	0.2922	0.151*
C6	0.5137 (5)	0.5538 (4)	0.2561 (3)	0.111 (4)
H6A	0.5243	0.5900	0.2378	0.133*
H6B	0.5344	0.5684	0.2848	0.133*
C7	0.4319 (3)	0.4367 (3)	0.2174 (2)	0.066 (2)
H7A	0.3981	0.4355	0.2003	0.079*
H7B	0.4277	0.3958	0.2167	0.079*
C8	0.4923 (3)	0.4833 (3)	0.1985 (2)	0.068 (2)
H8A	0.4867	0.5121	0.1798	0.082*
H8B	0.5085	0.4628	0.1798	0.082*
C9	0.4715 (4)	0.4440 (6)	0.2907 (3)	0.139 (5)
H9A	0.4543	0.3998	0.2953	0.166*
H9B	0.4772	0.4638	0.3197	0.166*
C10	0.5314 (4)	0.4705 (3)	0.2665 (2)	0.080 (2)
H10A	0.5654	0.4887	0.2879	0.097*
H10B	0.5338	0.4378	0.2505	0.097*
C11	0.3838 (3)	0.6592 (3)	0.2300 (2)	0.062 (1)
H11A	0.4232	0.6961	0.2235	0.074*
H11B	0.3834	0.6242	0.2154	0.074*
C12	0.3769 (2)	0.6486 (2)	0.2798 (2)	0.0367 (8)
H12A	0.3618	0.6051	0.2863	0.044*
H12B	0.4169	0.6729	0.2944	0.044*
C13	0.3955 (2)	0.6873 (2)	0.4054 (1)	0.0384 (8)
H13A	0.4221	0.7312	0.3992	0.046*
H13B	0.4128	0.6647	0.3904	0.046*
C14	0.3926 (2)	0.6760 (3)	0.4550 (2)	0.050 (1)
H14A	0.3961	0.6396	0.4612	0.060*
H14B	0.4265	0.7114	0.4699	0.060*
N11A_e	0.4625 (7)	0.4273 (5)	0.4797 (5)	0.057 (3)	0.5
N12A_e	0.4077 (5)	0.3171 (4)	0.4549 (4)	0.035 (2)	0.5
H12N_e	0.3860	0.2738	0.4449	0.042*	0.5
C15A_e	0.4859 (5)	0.3932 (5)	0.5062 (4)	0.054 (2)	0.5
H15A_e	0.4796	0.3967	0.5379	0.065*	0.5
H15B_e	0.5299	0.4104	0.5009	0.065*	0.5
C16A_e	0.4508 (4)	0.3260 (5)	0.4919 (3)	0.045 (2)	0.5
H16A_e	0.4800	0.3132	0.4823	0.054*	0.5
H16B_e	0.4277	0.3004	0.5173	0.054*	0.5
C17A_e	0.4761 (7)	0.4240 (5)	0.4331 (3)	0.065 (3)	0.5
H17A_e	0.5206	0.4429	0.4290	0.078*	0.5
H17B_e	0.4617	0.4468	0.4151	0.078*	0.5
C18A_e	0.4454 (5)	0.3588 (5)	0.4180 (3)	0.055 (3)	0.5
H18A_e	0.4764	0.3485	0.4086	0.066*	0.5
H18B_e	0.4189	0.3533	0.3925	0.066*	0.5
C19A_e	0.3974 (5)	0.4013 (6)	0.4859 (4)	0.060 (3)	0.5
H19A_e	0.3831	0.4251	0.4691	0.072*	0.5
H19B_e	0.3885	0.4030	0.5174	0.072*	0.5
C20A_e	0.3641 (5)	0.3353 (5)	0.4703 (4)	0.052 (2)	0.5
H20A_e	0.3397	0.3084	0.4947	0.062*	0.5
H20B_e	0.3361	0.3306	0.4460	0.062*	0.5
N11B_f	0.5240 (5)	0.5477 (5)	0.5162 (4)	0.047 (2)	0.5
H11N_f	0.5007	0.5040	0.5071	0.08 (4)*	0.5
N12B_f	0.5836 (6)	0.6587 (5)	0.5401 (4)	0.046 (2)	0.5
C15B_f	0.5711 (5)	0.5853 (5)	0.4820 (3)	0.053 (2)	0.5
H15C_f	0.5508	0.5875	0.4548	0.064*	0.5
H15D_f	0.5959	0.5664	0.4747	0.064*	0.5
C16B_f	0.6117 (6)	0.6492 (6)	0.5005 (4)	0.066 (3)	0.5
H16C_f	0.6520	0.6546	0.5082	0.079*	0.5
H16D_f	0.6178	0.6799	0.4780	0.079*	0.5
C17B_f	0.4833 (5)	0.5719 (6)	0.5220 (4)	0.065 (3)	0.5
H17C_f	0.4556	0.5515	0.5471	0.078*	0.5
H17D_f	0.4583	0.5644	0.4953	0.078*	0.5
C18B_f	0.5214 (6)	0.6400 (6)	0.5307 (6)	0.078 (4)	0.5
H18C_f	0.5196	0.6624	0.5046	0.094*	0.5
H18D_f	0.5039	0.6507	0.5559	0.094*	0.5
C19B_f	0.5587 (6)	0.5548 (6)	0.5587 (3)	0.064 (3)	0.5
H19C_f	0.5310	0.5260	0.5811	0.077*	0.5
H19D_f	0.5917	0.5456	0.5533	0.077*	0.5
C20B_f	0.5852 (7)	0.6194 (7)	0.5751 (4)	0.071 (3)	0.5
H20C_f	0.5617	0.6201	0.6008	0.085*	0.5
H20D_f	0.6278	0.6349	0.5846	0.085*	0.5

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Nb1	0.0177 (1)	0.0180 (1)	0.0190 (1)	0.00960 (9)	0.00115 (8)	0.00467 (8)
Nb2	0.0173 (1)	0.0171 (1)	0.0219 (1)	0.01010 (9)	0.00278 (8)	0.00274 (8)
Nb3	0.0150 (1)	0.0168 (1)	0.0208 (1)	0.00477 (8)	−0.00174 (8)	−0.00031 (8)
Nb4	0.0344 (1)	0.0229 (1)	0.0134 (1)	0.0183 (1)	−0.00046 (9)	−0.00156 (8)
Cl1	0.0358 (4)	0.0326 (4)	0.0356 (4)	0.0263 (3)	0.0092 (3)	0.0136 (3)
Cl2	0.0268 (3)	0.0362 (4)	0.0221 (3)	0.0111 (3)	−0.0070 (3)	0.0030 (3)
Cl3	0.0323 (4)	0.0202 (3)	0.0319 (4)	0.0097 (3)	0.0030 (3)	−0.0067 (3)
Cl4	0.0296 (3)	0.0275 (3)	0.0239 (3)	0.0165 (3)	0.0086 (3)	0.0068 (3)
Cl5	0.0156 (3)	0.0345 (4)	0.0377 (4)	0.0118 (3)	0.0001 (3)	0.0010 (3)
Cl6	0.0251 (3)	0.0165 (3)	0.0326 (4)	0.0051 (2)	0.0029 (3)	0.0053 (3)
Cl7	0.0320 (4)	0.0323 (4)	0.0178 (3)	0.0089 (3)	−0.0054 (3)	−0.0070 (3)
Cl8	0.0811 (8)	0.0182 (3)	0.0238 (4)	0.0152 (4)	0.0029 (4)	−0.0004 (3)
S1	0.0696 (8)	0.0401 (5)	0.0467 (6)	0.0325 (5)	−0.0303 (5)	−0.0006 (4)
S2B_a	0.041 (1)	0.091 (2)	0.082 (7)	0.047 (2)	−0.016 (2)	−0.036 (2)
S2A_b	0.036 (2)	0.082 (3)	0.041 (3)	0.041 (2)	0.000 (1)	−0.006 (2)
S3A_c	0.0190 (9)	0.039 (2)	0.053 (3)	0.0002 (9)	−0.005 (1)	0.005 (2)
S3B_d	0.0195 (8)	0.028 (1)	0.047 (3)	0.0042 (8)	0.002 (1)	0.001 (1)
S4	0.093 (1)	0.0522 (7)	0.0262 (5)	0.0316 (7)	−0.0004 (5)	−0.0151 (4)
N1	0.032 (1)	0.033 (1)	0.030 (1)	0.019 (1)	0.006 (1)	0.012 (1)
N2	0.036 (2)	0.032 (1)	0.045 (2)	0.024 (1)	0.016 (1)	0.009 (1)
N3	0.025 (1)	0.032 (2)	0.033 (2)	0.002 (1)	−0.004 (1)	−0.007 (1)
N4	0.088 (3)	0.044 (2)	0.026 (1)	0.049 (2)	−0.003 (2)	−0.006 (1)
N5	0.117 (5)	0.174 (8)	0.042 (3)	0.093 (6)	0.016 (3)	0.030 (4)
N6	0.114 (4)	0.063 (3)	0.033 (2)	0.061 (3)	−0.012 (2)	−0.002 (2)
N7	0.042 (2)	0.042 (2)	0.044 (3)	0.021 (1)	0.00	0.00
N8	0.024 (1)	0.024 (1)	0.040 (3)	0.0118 (6)	0.00	0.00
N9	0.027 (1)	0.027 (1)	0.028 (2)	0.0133 (7)	0.00	0.00
N10	0.051 (2)	0.051 (2)	0.032 (3)	0.026 (1)	0.00	0.00
C1	0.026 (1)	0.026 (1)	0.024 (1)	0.015 (1)	−0.001 (1)	0.001 (1)
C2	0.039 (2)	0.038 (2)	0.067 (3)	0.026 (2)	0.026 (2)	0.015 (2)
C3	0.022 (1)	0.030 (2)	0.043 (2)	0.008 (1)	−0.001 (1)	−0.013 (1)
C4	0.061 (2)	0.025 (2)	0.025 (2)	0.023 (2)	0.005 (2)	0.001 (1)
C5	0.146 (9)	0.17 (1)	0.123 (8)	0.122 (9)	−0.045 (7)	−0.086 (7)
C6	0.19 (1)	0.080 (5)	0.098 (6)	0.099 (7)	−0.065 (6)	−0.047 (4)
C7	0.088 (4)	0.057 (3)	0.058 (3)	0.040 (3)	0.007 (3)	0.001 (3)
C8	0.101 (5)	0.067 (4)	0.040 (3)	0.045 (4)	−0.010 (3)	−0.010 (2)
C9	0.114 (7)	0.25 (1)	0.071 (5)	0.107 (9)	0.015 (5)	0.085 (7)
C10	0.125 (6)	0.062 (4)	0.061 (4)	0.051 (4)	−0.025 (4)	0.007 (3)
C11	0.063 (3)	0.084 (4)	0.060 (3)	0.053 (3)	−0.001 (3)	−0.013 (3)
C12	0.028 (2)	0.032 (2)	0.057 (2)	0.020 (1)	−0.002 (2)	−0.003 (2)
C13	0.026 (2)	0.042 (2)	0.046 (2)	0.015 (2)	−0.002 (2)	−0.002 (2)
C14	0.043 (2)	0.063 (3)	0.043 (2)	0.025 (2)	−0.014 (2)	−0.010 (2)
N11A_e	0.069 (8)	0.038 (5)	0.053 (6)	0.019 (6)	0.014 (5)	0.013 (5)
N12A_e	0.041 (4)	0.038 (4)	0.034 (4)	0.025 (4)	0.012 (3)	0.013 (4)
C15A_e	0.046 (5)	0.059 (6)	0.056 (6)	0.025 (5)	0.013 (4)	0.019 (5)
C16A_e	0.050 (5)	0.065 (6)	0.036 (4)	0.042 (5)	0.011 (4)	0.020 (4)
C17A_e	0.10 (1)	0.065 (7)	0.041 (5)	0.052 (7)	0.024 (6)	0.023 (5)
C18A_e	0.066 (6)	0.070 (7)	0.039 (4)	0.041 (6)	0.020 (4)	0.020 (4)
C19A_e	0.063 (6)	0.074 (7)	0.064 (7)	0.051 (6)	0.009 (5)	−0.001 (6)
C20A_e	0.055 (6)	0.060 (6)	0.060 (6)	0.043 (5)	0.015 (5)	0.010 (5)
N11B_f	0.048 (6)	0.043 (5)	0.043 (5)	0.018 (5)	0.013 (4)	0.012 (5)
N12B_f	0.047 (5)	0.057 (6)	0.043 (5)	0.032 (6)	0.000 (4)	0.001 (5)
C15B_f	0.070 (7)	0.068 (6)	0.035 (4)	0.046 (6)	0.014 (4)	0.012 (4)
C16B_f	0.069 (7)	0.065 (7)	0.053 (6)	0.025 (6)	0.030 (6)	0.010 (5)
C17B_f	0.048 (6)	0.093 (9)	0.060 (6)	0.040 (6)	0.009 (5)	0.021 (6)
C18B_f	0.060 (7)	0.082 (9)	0.12 (1)	0.060 (7)	−0.014 (8)	−0.013 (9)
C19B_f	0.089 (8)	0.099 (9)	0.040 (5)	0.072 (8)	0.021 (5)	0.031 (5)
C20B_f	0.081 (9)	0.10 (1)	0.044 (5)	0.060 (8)	−0.007 (5)	0.009 (6)

Geometric parameters (Å, º) top

Nb1—N1	2.200 (3)	C5—C6	1.48 (1)
Nb1—Cl1	2.4530 (8)	C5—H5A	0.9900
Nb1—Cl6ⁱ	2.4605 (8)	C5—H5B	0.9900
Nb1—Cl2	2.4617 (8)	C6—H6A	0.9900
Nb1—Cl4ⁱ	2.4631 (8)	C6—H6B	0.9900
Nb1—Nb2ⁱ	2.9165 (4)	C7—C8	1.506 (9)
Nb1—Nb3ⁱ	2.9220 (4)	C7—H7A	0.9900
Nb1—Nb2	2.9221 (4)	C7—H7B	0.9900
Nb1—Nb3	2.9241 (4)	C8—H8A	0.9900
Nb2—N2	2.211 (3)	C8—H8B	0.9900
Nb2—Cl1	2.4467 (8)	C9—C10	1.51 (1)
Nb2—Cl4	2.4527 (8)	C9—H9A	0.9900
Nb2—Cl3	2.4593 (8)	C9—H9B	0.9900
Nb2—Cl5	2.4651 (8)	C10—H10A	0.9900
Nb2—Nb1ⁱ	2.9164 (4)	C10—H10B	0.9900
Nb2—Nb3ⁱ	2.9207 (4)	C11—C12	1.534 (7)
Nb2—Nb3	2.9293 (4)	C11—H11A	0.9900
Nb3—N3	2.201 (3)	C11—H11B	0.9900
Nb3—Cl2	2.4561 (8)	C12—H12A	0.9900
Nb3—Cl5	2.4573 (8)	C12—H12B	0.9900
Nb3—Cl3ⁱ	2.4602 (8)	C13—C14	1.532 (6)
Nb3—Cl6	2.4627 (8)	C13—H13A	0.9900
Nb3—Nb2ⁱ	2.9207 (4)	C13—H13B	0.9900
Nb3—Nb1ⁱ	2.9221 (4)	C14—H14A	0.9900
Nb4—N4	2.199 (3)	C14—H14B	0.9900
Nb4—Cl8	2.456 (1)	N11A_e—C19A_e	1.45 (2)
Nb4—Cl7ⁱⁱ	2.4568 (9)	N11A_e—C17A_e	1.47 (2)
Nb4—Cl7	2.4587 (9)	N11A_e—C15A_e	1.50 (2)
Nb4—Cl8ⁱⁱⁱ	2.462 (1)	N12A_e—C20A_e	1.47 (1)
Nb4—Nb4ⁱⁱⁱ	2.9199 (5)	N12A_e—C16A_e	1.51 (2)
Nb4—Nb4^iv	2.9199 (5)	N12A_e—C18A_e	1.51 (1)
Nb4—Nb4ⁱⁱ	2.9213 (5)	N12A_e—H12N_e	1.0000
Nb4—Nb4^v	2.9214 (5)	C15A_e—C16A_e	1.54 (2)
Cl3—Nb3ⁱ	2.4602 (8)	C15A_e—H15A_e	0.9900
Cl4—Nb1ⁱ	2.4629 (8)	C15A_e—H15B_e	0.9900
Cl6—Nb1ⁱ	2.4606 (8)	C16A_e—H16A_e	0.9900
Cl7—Nb4^v	2.4569 (9)	C16A_e—H16B_e	0.9900
Cl8—Nb4^iv	2.462 (1)	C17A_e—C18A_e	1.50 (2)
S1—C1	1.612 (3)	C17A_e—H17A_e	0.9900
S2B_a—C2	1.557 (5)	C17A_e—H17B_e	0.9900
S2A_b—C2	1.692 (7)	C18A_e—H18A_e	0.9900
S3A_c—C3	1.613 (4)	C18A_e—H18B_e	0.9900
S3B_d—C3	1.646 (5)	C19A_e—C20A_e	1.53 (2)
S4—C4	1.611 (4)	C19A_e—H19A_e	0.9900
N1—C1	1.149 (4)	C19A_e—H19B_e	0.9900
N2—C2	1.171 (5)	C20A_e—H20A_e	0.9900
N3—C3	1.156 (4)	C20A_e—H20B_e	0.9900
N4—C4	1.158 (5)	N11B_f—C17B_f	1.45 (2)
N5—C7	1.471 (8)	N11B_f—C15B_f	1.51 (1)
N5—C9	1.472 (9)	N11B_f—C19B_f	1.52 (2)
N5—C5	1.49 (1)	N11B_f—H11N_f	1.0000
N5—H5N	1.0000	N12B_f—C18B_f	1.43 (2)
N6—C6	1.466 (9)	N12B_f—C20B_f	1.48 (2)
N6—C10	1.495 (7)	N12B_f—C16B_f	1.48 (2)
N6—C8	1.512 (7)	C15B_f—C16B_f	1.53 (2)
N7—C11	1.479 (6)	C15B_f—H15C_f	0.9900
N7—C11^vi	1.479 (6)	C15B_f—H15D_f	0.9900
N7—C11^vii	1.480 (6)	C16B_f—H16C_f	0.9900
N8—C12^vii	1.488 (4)	C16B_f—H16D_f	0.9900
N8—C12^vi	1.488 (4)	C17B_f—C18B_f	1.52 (2)
N8—C12	1.489 (4)	C17B_f—H17C_f	0.9900
N8—H8N	1.0000	C17B_f—H17D_f	0.9900
N9—C13	1.483 (4)	C18B_f—H18C_f	0.9900
N9—C13^vii	1.483 (4)	C18B_f—H18D_f	0.9900
N9—C13^vi	1.483 (4)	C19B_f—C20B_f	1.51 (2)
N10—C14	1.489 (5)	C19B_f—H19C_f	0.9900
N10—C14^vii	1.489 (5)	C19B_f—H19D_f	0.9900
N10—C14^vi	1.489 (5)	C20B_f—H20C_f	0.9900
N10—H10N	1.0000	C20B_f—H20D_f	0.9900

N1—Nb1—Cl1	80.10 (8)	C12^vi—N8—C12	108.6 (3)
N1—Nb1—Cl6ⁱ	82.43 (9)	C12^vii—N8—H8N	110.3
Cl1—Nb1—Cl6ⁱ	87.98 (3)	C12^vi—N8—H8N	110.3
N1—Nb1—Cl2	80.31 (9)	C12—N8—H8N	110.3
Cl1—Nb1—Cl2	89.84 (3)	C13—N9—C13^vii	109.0 (3)
Cl6ⁱ—Nb1—Cl2	162.72 (3)	C13—N9—C13^vi	109.0 (3)
N1—Nb1—Cl4ⁱ	83.16 (8)	C13^vii—N9—C13^vi	109.0 (3)
Cl1—Nb1—Cl4ⁱ	163.08 (3)	C14—N10—C14^vii	109.3 (3)
Cl6ⁱ—Nb1—Cl4ⁱ	87.38 (3)	C14—N10—C14^vi	109.3 (3)
Cl2—Nb1—Cl4ⁱ	89.77 (3)	C14^vii—N10—C14^vi	109.3 (3)
N1—Nb1—Nb2ⁱ	136.57 (8)	C14—N10—H10N	109.6
Cl1—Nb1—Nb2ⁱ	143.33 (2)	C14^vii—N10—H10N	109.6
Cl6ⁱ—Nb1—Nb2ⁱ	95.69 (2)	C14^vi—N10—H10N	109.6
Cl2—Nb1—Nb2ⁱ	96.27 (2)	N1—C1—S1	179.1 (3)
Cl4ⁱ—Nb1—Nb2ⁱ	53.44 (2)	N2—C2—S2B_a	166.7 (8)
N1—Nb1—Nb3ⁱ	136.00 (9)	N2—C2—S2A_b	172.2 (6)
Cl1—Nb1—Nb3ⁱ	94.66 (2)	N3—C3—S3A_c	169.8 (7)
Cl6ⁱ—Nb1—Nb3ⁱ	53.63 (2)	N3—C3—S3B_d	169.7 (6)
Cl2—Nb1—Nb3ⁱ	143.65 (2)	N4—C4—S4	179.2 (4)
Cl4ⁱ—Nb1—Nb3ⁱ	95.66 (2)	C6—C5—N5	103.6 (7)
Nb2ⁱ—Nb1—Nb3ⁱ	60.229 (9)	C6—C5—H5A	111.0
N1—Nb1—Nb2	133.33 (8)	N5—C5—H5A	111.0
Cl1—Nb1—Nb2	53.29 (2)	C6—C5—H5B	111.0
Cl6ⁱ—Nb1—Nb2	96.66 (2)	N5—C5—H5B	111.0
Cl2—Nb1—Nb2	95.74 (2)	H5A—C5—H5B	109.0
Cl4ⁱ—Nb1—Nb2	143.51 (2)	N6—C6—C5	114.6 (6)
Nb2ⁱ—Nb1—Nb2	90.08 (1)	N6—C6—H6A	108.6
Nb3ⁱ—Nb1—Nb2	59.97 (1)	C5—C6—H6A	108.6
N1—Nb1—Nb3	133.73 (9)	N6—C6—H6B	108.6
Cl1—Nb1—Nb3	96.97 (2)	C5—C6—H6B	108.6
Cl6ⁱ—Nb1—Nb3	143.84 (2)	H6A—C6—H6B	107.6
Cl2—Nb1—Nb3	53.43 (2)	N5—C7—C8	106.2 (6)
Cl4ⁱ—Nb1—Nb3	96.37 (2)	N5—C7—H7A	110.5
Nb2ⁱ—Nb1—Nb3	60.009 (8)	C8—C7—H7A	110.5
Nb3ⁱ—Nb1—Nb3	90.22 (1)	N5—C7—H7B	110.5
Nb2—Nb1—Nb3	60.140 (9)	C8—C7—H7B	110.5
N2—Nb2—Cl1	80.88 (9)	H7A—C7—H7B	108.7
N2—Nb2—Cl4	82.00 (9)	C7—C8—N6	110.8 (5)
Cl1—Nb2—Cl4	162.82 (3)	C7—C8—H8A	109.5
N2—Nb2—Cl3	83.5 (1)	N6—C8—H8A	109.5
Cl1—Nb2—Cl3	88.20 (3)	C7—C8—H8B	109.5
Cl4—Nb2—Cl3	88.42 (3)	N6—C8—H8B	109.5
N2—Nb2—Cl5	79.4 (1)	H8A—C8—H8B	108.1
Cl1—Nb2—Cl5	89.22 (3)	N5—C9—C10	106.3 (6)
Cl4—Nb2—Cl5	89.08 (3)	N5—C9—H9A	110.5
Cl3—Nb2—Cl5	162.92 (3)	C10—C9—H9A	110.5
N2—Nb2—Nb1ⁱ	135.74 (8)	N5—C9—H9B	110.5
Cl1—Nb2—Nb1ⁱ	143.38 (2)	C10—C9—H9B	110.5
Cl4—Nb2—Nb1ⁱ	53.77 (2)	H9A—C9—H9B	108.7
Cl3—Nb2—Nb1ⁱ	95.52 (2)	N6—C10—C9	110.2 (6)
Cl5—Nb2—Nb1ⁱ	96.61 (2)	N6—C10—H10A	109.6
N2—Nb2—Nb3ⁱ	137.10 (9)	C9—C10—H10A	109.6
Cl1—Nb2—Nb3ⁱ	94.83 (2)	N6—C10—H10B	109.6
Cl4—Nb2—Nb3ⁱ	96.68 (2)	C9—C10—H10B	109.6
Cl3—Nb2—Nb3ⁱ	53.59 (2)	H10A—C10—H10B	108.1
Cl5—Nb2—Nb3ⁱ	143.48 (2)	N7—C11—C12	109.6 (4)
Nb1ⁱ—Nb2—Nb3ⁱ	60.125 (8)	N7—C11—H11A	109.7
N2—Nb2—Nb1	134.24 (8)	C12—C11—H11A	109.7
Cl1—Nb2—Nb1	53.49 (2)	N7—C11—H11B	109.7
Cl4—Nb2—Nb1	143.69 (2)	C12—C11—H11B	109.7
Cl3—Nb2—Nb1	96.83 (2)	H11A—C11—H11B	108.2
Cl5—Nb2—Nb1	95.17 (2)	N8—C12—C11	109.0 (4)
Nb1ⁱ—Nb2—Nb1	89.93 (1)	N8—C12—H12A	109.9
Nb3ⁱ—Nb2—Nb1	60.014 (9)	C11—C12—H12A	109.9
N2—Nb2—Nb3	132.7 (1)	N8—C12—H12B	109.9
Cl1—Nb2—Nb3	96.98 (2)	C11—C12—H12B	109.9
Cl4—Nb2—Nb3	95.70 (2)	H12A—C12—H12B	108.3
Cl3—Nb2—Nb3	143.72 (2)	N9—C13—C14	109.1 (4)
Cl5—Nb2—Nb3	53.36 (2)	N9—C13—H13A	109.9
Nb1ⁱ—Nb2—Nb3	59.983 (9)	C14—C13—H13A	109.9
Nb3ⁱ—Nb2—Nb3	90.147 (9)	N9—C13—H13B	109.9
Nb1—Nb2—Nb3	59.963 (9)	C14—C13—H13B	109.9
N3—Nb3—Cl2	83.07 (9)	H13A—C13—H13B	108.3
N3—Nb3—Cl5	80.0 (1)	N10—C14—C13	108.1 (4)
Cl2—Nb3—Cl5	87.27 (3)	N10—C14—H14A	110.1
N3—Nb3—Cl3ⁱ	83.1 (1)	C13—C14—H14A	110.1
Cl2—Nb3—Cl3ⁱ	88.24 (3)	N10—C14—H14B	110.1
Cl5—Nb3—Cl3ⁱ	162.87 (3)	C13—C14—H14B	110.1
N3—Nb3—Cl6	79.96 (9)	H14A—C14—H14B	108.4
Cl2—Nb3—Cl6	163.01 (3)	C19A_e—N11A_e—C17A_e	110 (1)
Cl5—Nb3—Cl6	88.87 (3)	C19A_e—N11A_e—C15A_e	110.9 (9)
Cl3ⁱ—Nb3—Cl6	90.63 (3)	C17A_e—N11A_e—C15A_e	108 (1)
N3—Nb3—Nb2ⁱ	136.56 (9)	C20A_e—N12A_e—C16A_e	108.6 (9)
Cl2—Nb3—Nb2ⁱ	96.29 (2)	C20A_e—N12A_e—C18A_e	109.1 (8)
Cl5—Nb3—Nb2ⁱ	143.44 (2)	C16A_e—N12A_e—C18A_e	107.0 (9)
Cl3ⁱ—Nb3—Nb2ⁱ	53.56 (2)	C20A_e—N12A_e—H12N_e	110.7
Cl6—Nb3—Nb2ⁱ	96.65 (2)	C16A_e—N12A_e—H12N_e	110.7
N3—Nb3—Nb1ⁱ	133.51 (9)	C18A_e—N12A_e—H12N_e	110.7
Cl2—Nb3—Nb1ⁱ	143.38 (2)	N11A_e—C15A_e—C16A_e	108.2 (9)
Cl5—Nb3—Nb1ⁱ	96.64 (2)	N11A_e—C15A_e—H15A_e	110.1
Cl3ⁱ—Nb3—Nb1ⁱ	96.81 (2)	C16A_e—C15A_e—H15A_e	110.1
Cl6—Nb3—Nb1ⁱ	53.56 (2)	N11A_e—C15A_e—H15B_e	110.1
Nb2ⁱ—Nb3—Nb1ⁱ	60.019 (9)	C16A_e—C15A_e—H15B_e	110.1
N3—Nb3—Nb1	136.67 (9)	H15A_e—C15A_e—H15B_e	108.4
Cl2—Nb3—Nb1	53.60 (2)	N12A_e—C16A_e—C15A_e	110.5 (7)
Cl5—Nb3—Nb1	95.30 (2)	N12A_e—C16A_e—H16A_e	109.5
Cl3ⁱ—Nb3—Nb1	95.31 (2)	C15A_e—C16A_e—H16A_e	109.5
Cl6—Nb3—Nb1	143.32 (2)	N12A_e—C16A_e—H16B_e	109.5
Nb2ⁱ—Nb3—Nb1	59.867 (8)	C15A_e—C16A_e—H16B_e	109.5
Nb1ⁱ—Nb3—Nb1	89.78 (1)	H16A_e—C16A_e—H16B_e	108.1
N3—Nb3—Nb2	133.54 (9)	N11A_e—C17A_e—C18A_e	110.4 (9)
Cl2—Nb3—Nb2	95.68 (2)	N11A_e—C17A_e—H17A_e	109.6
Cl5—Nb3—Nb2	53.60 (2)	C18A_e—C17A_e—H17A_e	109.6
Cl3ⁱ—Nb3—Nb2	143.40 (2)	N11A_e—C17A_e—H17B_e	109.6
Cl6—Nb3—Nb2	95.31 (2)	C18A_e—C17A_e—H17B_e	109.6
Nb2ⁱ—Nb3—Nb2	89.855 (9)	H17A_e—C17A_e—H17B_e	108.1
Nb1ⁱ—Nb3—Nb2	59.790 (9)	C17A_e—C18A_e—N12A_e	110.1 (8)
Nb1—Nb3—Nb2	59.898 (9)	C17A_e—C18A_e—H18A_e	109.6
N4—Nb4—Cl8	82.8 (1)	N12A_e—C18A_e—H18A_e	109.6
N4—Nb4—Cl7ⁱⁱ	80.0 (1)	C17A_e—C18A_e—H18B_e	109.6
Cl8—Nb4—Cl7ⁱⁱ	162.74 (3)	N12A_e—C18A_e—H18B_e	109.6
N4—Nb4—Cl7	79.5 (1)	H18A_e—C18A_e—H18B_e	108.2
Cl8—Nb4—Cl7	90.39 (4)	N11A_e—C19A_e—C20A_e	109.7 (8)
Cl7ⁱⁱ—Nb4—Cl7	88.07 (4)	N11A_e—C19A_e—H19A_e	109.7
N4—Nb4—Cl8ⁱⁱⁱ	83.4 (1)	C20A_e—C19A_e—H19A_e	109.7
Cl8—Nb4—Cl8ⁱⁱⁱ	88.75 (1)	N11A_e—C19A_e—H19B_e	109.7
Cl7ⁱⁱ—Nb4—Cl8ⁱⁱⁱ	87.71 (4)	C20A_e—C19A_e—H19B_e	109.7
Cl7—Nb4—Cl8ⁱⁱⁱ	162.93 (3)	H19A_e—C19A_e—H19B_e	108.2
N4—Nb4—Nb4ⁱⁱⁱ	136.9 (1)	N12A_e—C20A_e—C19A_e	110.7 (9)
Cl8—Nb4—Nb4ⁱⁱⁱ	95.17 (3)	N12A_e—C20A_e—H20A_e	109.5
Cl7ⁱⁱ—Nb4—Nb4ⁱⁱⁱ	96.27 (2)	C19A_e—C20A_e—H20A_e	109.5
Cl7—Nb4—Nb4ⁱⁱⁱ	143.51 (2)	N12A_e—C20A_e—H20B_e	109.5
Cl8ⁱⁱⁱ—Nb4—Nb4ⁱⁱⁱ	53.49 (2)	C19A_e—C20A_e—H20B_e	109.5
N4—Nb4—Nb4^iv	136.4 (1)	H20A_e—C20A_e—H20B_e	108.1
Cl8—Nb4—Nb4^iv	53.67 (2)	C17B_f—N11B_f—C15B_f	108.8 (9)
Cl7ⁱⁱ—Nb4—Nb4^iv	143.57 (2)	C17B_f—N11B_f—C19B_f	110 (1)
Cl7—Nb4—Nb4^iv	96.22 (2)	C15B_f—N11B_f—C19B_f	106 (1)
Cl8ⁱⁱⁱ—Nb4—Nb4^iv	96.98 (3)	C17B_f—N11B_f—H11N_f	110.6
Nb4ⁱⁱⁱ—Nb4—Nb4^iv	60.03 (1)	C15B_f—N11B_f—H11N_f	110.6
N4—Nb4—Nb4ⁱⁱ	133.5 (1)	C19B_f—N11B_f—H11N_f	110.6
Cl8—Nb4—Nb4ⁱⁱ	143.64 (2)	C18B_f—N12B_f—C20B_f	109 (1)
Cl7ⁱⁱ—Nb4—Nb4ⁱⁱ	53.57 (2)	C18B_f—N12B_f—C16B_f	109 (1)
Cl7—Nb4—Nb4ⁱⁱ	95.77 (2)	C20B_f—N12B_f—C16B_f	107 (1)
Cl8ⁱⁱⁱ—Nb4—Nb4ⁱⁱ	95.01 (3)	N11B_f—C15B_f—C16B_f	108.4 (8)
Nb4ⁱⁱⁱ—Nb4—Nb4ⁱⁱ	59.987 (6)	N11B_f—C15B_f—H15C_f	110.0
Nb4^iv—Nb4—Nb4ⁱⁱ	90.0	C16B_f—C15B_f—H15C_f	110.0
N4—Nb4—Nb4^v	133.0 (1)	N11B_f—C15B_f—H15D_f	110.0
Cl8—Nb4—Nb4^v	97.08 (3)	C16B_f—C15B_f—H15D_f	110.0
Cl7ⁱⁱ—Nb4—Nb4^v	95.81 (2)	H15C_f—C15B_f—H15D_f	108.4
Cl7—Nb4—Nb4^v	53.51 (2)	N12B_f—C16B_f—C15B_f	110.4 (9)
Cl8ⁱⁱⁱ—Nb4—Nb4^v	143.46 (2)	N12B_f—C16B_f—H16C_f	109.6
Nb4ⁱⁱⁱ—Nb4—Nb4^v	90.0	C15B_f—C16B_f—H16C_f	109.6
Nb4^iv—Nb4—Nb4^v	59.986 (6)	N12B_f—C16B_f—H16D_f	109.6
Nb4ⁱⁱ—Nb4—Nb4^v	60.0	C15B_f—C16B_f—H16D_f	109.6
Nb2—Cl1—Nb1	73.22 (2)	H16C_f—C16B_f—H16D_f	108.1
Nb3—Cl2—Nb1	72.97 (2)	N11B_f—C17B_f—C18B_f	108.6 (9)
Nb2—Cl3—Nb3ⁱ	72.84 (2)	N11B_f—C17B_f—H17C_f	110.0
Nb2—Cl4—Nb1ⁱ	72.78 (2)	C18B_f—C17B_f—H17C_f	110.0
Nb3—Cl5—Nb2	73.04 (2)	N11B_f—C17B_f—H17D_f	110.0
Nb1ⁱ—Cl6—Nb3	72.81 (2)	C18B_f—C17B_f—H17D_f	110.0
Nb4^v—Cl7—Nb4	72.93 (2)	H17C_f—C17B_f—H17D_f	108.4
Nb4—Cl8—Nb4^iv	72.84 (3)	N12B_f—C18B_f—C17B_f	112.4 (9)
C1—N1—Nb1	158.1 (3)	N12B_f—C18B_f—H18C_f	109.1
C2—N2—Nb2	143.3 (4)	C17B_f—C18B_f—H18C_f	109.1
C3—N3—Nb3	154.5 (3)	N12B_f—C18B_f—H18D_f	109.1
C4—N4—Nb4	146.7 (3)	C17B_f—C18B_f—H18D_f	109.1
C7—N5—C9	110.4 (7)	H18C_f—C18B_f—H18D_f	107.9
C7—N5—C5	109.4 (6)	C20B_f—C19B_f—N11B_f	109.0 (8)
C9—N5—C5	112.4 (9)	C20B_f—C19B_f—H19C_f	109.9
C7—N5—H5N	108.1	N11B_f—C19B_f—H19C_f	109.9
C9—N5—H5N	108.1	C20B_f—C19B_f—H19D_f	109.9
C5—N5—H5N	108.1	N11B_f—C19B_f—H19D_f	109.9
C6—N6—C10	107.9 (6)	H19C_f—C19B_f—H19D_f	108.3
C6—N6—C8	105.2 (5)	N12B_f—C20B_f—C19B_f	110 (1)
C10—N6—C8	105.1 (5)	N12B_f—C20B_f—H20C_f	109.6
C11—N7—C11^vi	108.6 (3)	C19B_f—C20B_f—H20C_f	109.6
C11—N7—C11^vii	108.6 (3)	N12B_f—C20B_f—H20D_f	109.6
C11^vi—N7—C11^vii	108.6 (3)	C19B_f—C20B_f—H20D_f	109.6
C12^vii—N8—C12^vi	108.6 (3)	H20C_f—C20B_f—H20D_f	108.1
C12^vii—N8—C12	108.6 (3)

Nb2—N2—C2—S2B_a	−156 (2)	C17A_e—N11A_e—C15A_e—C16A_e	−63 (1)
Nb3—N3—C3—S3A_c	−130 (2)	C20A_e—N12A_e—C16A_e—C15A_e	−60 (1)
Nb3—N3—C3—S3B_d	51 (3)	C18A_e—N12A_e—C16A_e—C15A_e	57 (1)
C7—N5—C5—C6	−75.1 (9)	N11A_e—C15A_e—C16A_e—N12A_e	3 (1)
C9—N5—C5—C6	48.0 (9)	C19A_e—N11A_e—C17A_e—C18A_e	−61 (1)
C10—N6—C6—C5	−68.9 (9)	C15A_e—N11A_e—C17A_e—C18A_e	60 (1)
C8—N6—C6—C5	42.8 (9)	N11A_e—C17A_e—C18A_e—N12A_e	3 (2)
N5—C5—C6—N6	22 (1)	C20A_e—N12A_e—C18A_e—C17A_e	56 (1)
C9—N5—C7—C8	−73.2 (9)	C16A_e—N12A_e—C18A_e—C17A_e	−61 (1)
C5—N5—C7—C8	51.2 (8)	C17A_e—N11A_e—C19A_e—C20A_e	58 (1)
N5—C7—C8—N6	19.7 (7)	C15A_e—N11A_e—C19A_e—C20A_e	−61 (1)
C6—N6—C8—C7	−67.5 (7)	C16A_e—N12A_e—C20A_e—C19A_e	58 (1)
C10—N6—C8—C7	46.2 (7)	C18A_e—N12A_e—C20A_e—C19A_e	−58 (1)
C7—N5—C9—C10	49 (1)	N11A_e—C19A_e—C20A_e—N12A_e	2 (1)
C5—N5—C9—C10	−73 (1)	C17B_f—N11B_f—C15B_f—C16B_f	67 (1)
C6—N6—C10—C9	40.7 (9)	C19B_f—N11B_f—C15B_f—C16B_f	−51 (1)
C8—N6—C10—C9	−71.2 (8)	C18B_f—N12B_f—C16B_f—C15B_f	−49 (2)
N5—C9—C10—N6	22 (1)	C20B_f—N12B_f—C16B_f—C15B_f	69 (1)
C11^vi—N7—C11—C12	−49.6 (5)	N11B_f—C15B_f—C16B_f—N12B_f	−14 (2)
C11^vii—N7—C11—C12	68.4 (5)	C15B_f—N11B_f—C17B_f—C18B_f	−52 (1)
C12^vii—N8—C12—C11	−49.6 (5)	C19B_f—N11B_f—C17B_f—C18B_f	64 (1)
C12^vi—N8—C12—C11	68.3 (4)	C20B_f—N12B_f—C18B_f—C17B_f	−51 (2)
N7—C11—C12—N8	−16.1 (5)	C16B_f—N12B_f—C18B_f—C17B_f	65 (2)
C13^vii—N9—C13—C14	69.6 (4)	N11B_f—C17B_f—C18B_f—N12B_f	−12 (2)
C13^vi—N9—C13—C14	−49.2 (4)	C17B_f—N11B_f—C19B_f—C20B_f	−49 (1)
C14^vii—N10—C14—C13	−49.7 (5)	C15B_f—N11B_f—C19B_f—C20B_f	68 (1)
C14^vi—N10—C14—C13	69.9 (4)	C18B_f—N12B_f—C20B_f—C19B_f	66 (1)
N9—C13—C14—N10	−17.3 (5)	C16B_f—N12B_f—C20B_f—C19B_f	−51 (1)
C19A_e—N11A_e—C15A_e—C16A_e	58 (1)	N11B_f—C19B_f—C20B_f—N12B_f	−15 (1)

Symmetry codes: (i) −x+1/3, −y+2/3, −z+2/3; (ii) −y+1, x−y, z; (iii) x−y+1/3, x−1/3, −z+2/3; (iv) y+1/3, −x+y+2/3, −z+2/3; (v) −x+y+1, −x+1, z; (vi) −x+y, −x+1, z; (vii) −y+1, x−y+1, z.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N5—H5N···Cl5	1.00	2.46	3.368 (7)	150
N8—H8N···N9	1.00	1.80	2.795 (8)	180
N10—H10N···Cl7^viii	1.00	2.90	3.695 (5)	137
N12A—H12N···N6ⁱⁱⁱ	1.00	1.59	2.59 (1)	176
N10—H10N···Cl7^ix	1.00	2.90	3.695 (5)	137
N10—H10N···Cl7^x	1.00	2.90	3.695 (5)	137

Symmetry codes: (iii) x−y+1/3, x−1/3, −z+2/3; (viii) −x+1, −y+1, −z+1; (ix) y, −x+y+1, −z+1; (x) x−y, x, −z+1.

Acknowledgements

We gratefully acknowledge the maintenance of the XRD equipment through Dr Alexander Villinger (University of Rostock).

Funding information

Funding for this research was provided by: Deutsche Forschungsgemeinschaft (Germany), SPP1708 (grant No. KO1616/8).

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