Bis{μ-1,3-bis­[dimeth­yl(pyridin-3-yl)sil­yl]propane-κ2N:N′}bis­[di­iodido­zinc(II)] from synchrotron data

Song, J.; Kim, D.; Lee, Y.-A.

doi:10.1107/S2414314626001835

metal-organic compounds

IUCrDATA

ISSN: 2414-3146

Volume 11| Part 2| February 2026| x260183

https://doi.org/10.1107/S2414314626001835

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Bis{μ-1,3-bis[dimethyl(pyridin-3-yl)silyl]propane-κ²N:N′}bis[diiodidozinc(II)] from synchrotron data

Jiyeong Song,^a Dongwon Kim ^b ^* and Young-A Lee ^a ^*

^aDepartment of Chemistry, Jeonbuk National University, Jeonju 54896, Republic of Korea, and ^bBeamline Department, Pohang Acceleratory Laboratory, Pohang 37673, Republic of Korea
^*Correspondence e-mail: [email protected], [email protected]

Edited by M. Zeller, Purdue University, USA (Received 20 January 2026; accepted 19 February 2026; online 24 February 2026)

The structure of the title compound, [Zn₂I₄(C₃₄H₅₂N₄Si₄)₂], has been determined from synchrotron data, λ = 0.70000 Å. The complete metallacyclic molecule is generated by crystallographic inversion symmetry, with the Zn^II ion located in a general position. The 1,3-bis(dimethylsilyl-3-pyridine)propane ligand binds to two zinc(II) ions in a horse-shoe fashion, resulting in formation of a dimeric 24-membered macrocycle. The Zn^II ion has a typical tetrahedral geometry via two iodide ions and two N donor atoms of the 1,3-bis(dimethylsilyl-3-pyridine)propane ligand. The macrocyclic dimers interact via weak interactions [I⋯H (H₃CSi-) = 3.08, 3.27 Å].

Keywords: crystal structure; metallamacrocyclic complex; 1,3-bis(dimethylsilyl-3-pyridine)propane ligand; zinc(II) complexes; Synchrotron data.

CCDC reference: 2531921

Structure description

Designed horse-shoe bidentate N-donors provide, via the introduction of appropriate metal cations, wider opportunities for task-specific metallacycles as receptors (Na et al., 2008 ). Specifically, Zn^II complexes of functional N-donor ligands have been extensively examined for metallo-enzymes, zinc finger proteins, transmetallation, recognition, photoluminescence (PL), and catalysts (Porchia et al., 2020 ). In particular, arrays of macrocyclic molecular units, especially after the emergence of additional functionalities, have attracted crystal engineers for the past decade (Lindoy et al., 2013 ) in the fields of molecular adsorption, recognition, ion exchange, confinement catalysis, and luminescent chemosensing. Here, we report the crystal structure of a Zn^II 24-membered macrocycle, [ZnI₂(L)]₂, via self-assembly of ZnI₂ with 1,3-bis(dimethylsilyl-m-pyridine)propane (L) as a hemi-circular bidentate ligand. The incorporation of the flexible dimethylsilyl spacers in L plays a crucial role in the assembly process. This moiety provides the necessary conformational freedom and specific curvature to accommodate the tetrahedral coordination geometry of the Zn^II ions, thereby facilitating the formation of a discrete, strain-free macrocyclic architecture without significant steric hindrance.

The defining structural feature of the title complex is the formation of a 24-membered centrosymmetric macrocyclodimer. The relevant bond lengths and angles are listed in Table 1. The local geometry around the Zn^II cation approximates to a typical tetrahedral arrangement with two N donors from two ligands [N—Zn—N = 101.75 (11)°] and two iodide ions [I—Zn—I = 121.03 (2)°]. For the 24-membered macrocycle, the intramolecular Zn⋯Zn separation distance is 8.118 (2) Å, and the shortest distance [C1⋯C2ⁱⁱⁱ or C2⋯C1ⁱⁱⁱ; symmetry code: (iii) 1 − x, 1 − y, 1 − z] between two pyridyl moieties is 3.404 (7) Å. Fig. 1 illustrates the molecular structure of the centrosymmetric dimer. The propyl linkers adopt an extended all-anti conformation with close to 180° torsion angles, effectively minimizing intramolecular steric strain within the macrocycle. The flexible silicon bridges accommodate a slightly distorted tetrahedral geometry around the Zn^II center, allowing the formation of a discrete, strain-free assembly. This arrangement is further stabilized by the specific intermolecular interactions described below.

Table 1
Selected geometric parameters (Å, °)

Zn1—I1	2.5680 (7)	Zn1—N1	2.051 (3)
Zn1—I2	2.5688 (9)	Zn1—N2ⁱ	2.058 (3)

N1—Zn1—N2ⁱ	101.75 (11)	N1—Zn1—I2	103.93 (8)
N1—Zn1—I1	112.18 (9)	N2ⁱ—Zn1—I2	110.36 (8)
N2ⁱ—Zn1—I1	105.99 (8)	I1—Zn1—I2	121.03 (2)
Symmetry code: (i) .

Figure 1
A view of the molecular structure of the title compound, showing the macrocyclic dimers with displacement ellipsoids drawn at the 30% probability level. For clarity, H atoms have been omitted. Symmetry operation used to generate equivalent atoms: 1 − x, 1 − y, 1 − z.

The crystal packing of the title complex is primarily consolidated by a network of weak intermolecular C—H⋯I hydrogen bonds involving the pyridyl ligands (Table 2 and Fig. 2). Specifically, the pyridyl ring hydrogen atom H1 forms a hydrogen bond with the iodide atom I1 of an adjacent molecule. In addition, the other pyridyl hydrogen atom H15 also participates in a significant interaction with the iodide ligand. Although classical π–π stacking interactions are not prominent, these multiple weak C—H⋯I interactions serve as the principal forces that connect the layers and enhance the overall stability of the molecular arrangement in the solid state.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C1—H1⋯I1ⁱⁱ	0.95	3.08	3.805 (4)	135
C15—H15⋯I2ⁱⁱⁱ	0.95	3.27	3.756 (3)	114
Symmetry codes: (ii) ; (iii) .

Figure 2
The crystal packing in title compound. Dashed lines represent C—H⋯I interactions.

A search of the Cambridge Structural Database (CSD, version 6.00 with updates through April 2025; Groom et al., 2016 ) indicated that Hg^II complexes with the 1,3-bis(dimethylsilyl-3-pyridine)propane ligand had been reported previously. These complexes have been studied for straightforward formation of dianionic acetonylates (Hong et al., 2021 ). Furthermore, including the work by Na et al. (2008), a total of 14 complexes involving a cognate ligand, 1,3-bis[dimethyl(pyridin-3-yl)silyl]ethane, have been reported in the CSD. However, no corresponding Zn^II complex with the ligand has been reported and the title compound was newly synthesized for this research.

Synthesis and crystallization

The title Zn^II complex was prepared as follows. A solution was prepared by dissolving ZnI₂ (0.02 mmol) in ethanol, and another by dissolving 1,3-bis(dimethylsilyl-3-pyridine)propane (0.02 mmol) in ethanol. Slow diffusion of the two solutions over several days afforded colorless needle-shaped crystals suitable for X-ray diffraction. Yield: 91.4%. FT–IR (KBr pellet, cm⁻¹): 3436 (s), 2903 (m), 1589 (m), 1399 (m), 1255 (m), 1133 (m), 907 (m), 842 (m), 818 (m), 801 (m), 703 (m). ¹H NMR (400 MHz, Me₂SO-d₆, ppm): 8.59 (d, J = 1.4 Hz, 2H), 8.54 (dd, J = 4.9, 1.9 Hz, 2H), 7.82 (dt, J = 7.5, 1.9 Hz, 2H), 7.35 (dd, J = 7.5, 4.9 Hz, 2H), 1.50 −1.20 (m, 2H), 0.81 (dd, J = 6.9, 3.8 Hz, 4H), 0.23 (s, 12H). Analysis calculated for Zn₂Si₄N₄I₄C₃₄H₅₂·2.5H₂O (reflecting hygroscopic moisture) (M = 1312.57): C = 31.11%; H = 4.38%; N = 4.27%. Found: C = 31.10%; H = 4.11%; N = 4.38%.

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 3.

Table 3
Experimental details

Crystal data
Chemical formula	[Zn₂I₄(C₃₄H₅₂N₄Si₄)₂]
M_r	1267.49
Crystal system, space group	Triclinic, P $[\overline{1}]$
Temperature (K)	100
a, b, c (Å)	6.6360 (13), 13.531 (3), 14.416 (3)
α, β, γ (°)	107.03 (3), 91.52 (3), 100.29 (3)
V (Å³)	1213.5 (5)
Z	1
Radiation type	Synchrotron, λ = 0.700 Å
μ (mm⁻¹)	3.48
Crystal size (mm)	0.15 × 0.11 × 0.07

Data collection
Diffractometer	Rayonix MX225HS CCD area detector
Absorption correction	Empirical (using intensity measurements) (HKL3000sm SCALEPACK; Otwinowski et al., 2003 )
T_min, T_max	0.942, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections	13971, 7000, 6774
R_int	0.020
(sin θ/λ)_max (Å⁻¹)	0.704

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.042, 0.126, 1.15
No. of reflections	7000
No. of parameters	222
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	1.75, −1.60
Computer programs: PAL BL2D-SMDC Program (Shin et al., 2025 ), HKL3000sm (Otwinowski et al., 2003), SHELXT2018 (Sheldrick, 2015a ), SHELXL2025 (Sheldrick, 2015b ), DIAMOND 4 (Putz & Brandenburg, 2014 ) and publCIF (Westrip, 2010 ).

Structural data

CCDC reference: 2531921

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S2414314626001835/zl4091sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2414314626001835/zl4091Isup2.hkl

checkCIF report

Computing details top

Bis{µ-1,3-bis[dimethyl(pyridin-3-yl)silyl]propane-κ²N:N'}bis[diiodidozinc(II)] top

Crystal data top

[Zn₂I₄(C₃₄H₅₂N₄Si₄)₂]	Z = 1
M_r = 1267.49	F(000) = 612
Triclinic, P1	D_x = 1.734 Mg m⁻³
a = 6.6360 (13) Å	Synchrotron radiation, λ = 0.700 Å
b = 13.531 (3) Å	Cell parameters from 25750 reflections
c = 14.416 (3) Å	θ = 0.4–29.5°
α = 107.03 (3)°	µ = 3.48 mm⁻¹
β = 91.52 (3)°	T = 100 K
γ = 100.29 (3)°	Block, colorless
V = 1213.5 (5) Å³	0.15 × 0.11 × 0.07 mm

Data collection top

Rayonix MX225HS CCD area detector diffractometer	6774 reflections with I > 2σ(I)
Radiation source: PLSII 2D bending magnet	R_int = 0.020
ω scan	θ_max = 29.6°, θ_min = 1.5°
Absorption correction: empirical (using intensity measurements) (HKL3000sm Scalepack; Otwinowski et al., 2003)	h = −9→9
T_min = 0.942, T_max = 1.000	k = −19→19
13971 measured reflections	l = −20→20
7000 independent reflections

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.042	H-atom parameters constrained
wR(F²) = 0.126	w = 1/[σ²(F_o²) + (0.0818P)² + 1.9207P] where P = (F_o² + 2F_c²)/3
S = 1.15	(Δ/σ)_max = 0.001
7000 reflections	Δρ_max = 1.75 e Å⁻³
222 parameters	Δρ_min = −1.60 e Å⁻³
0 restraints	Extinction correction: SHELXL2025/1 (Sheldrick 2015b), Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
Primary atom site location: dual	Extinction coefficient: 0.0393 (15)

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.

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

	x	y	z	U_iso*/U_eq
I1	0.02739 (3)	0.60462 (2)	0.71151 (2)	0.02188 (9)
I2	−0.04076 (3)	0.28606 (2)	0.75347 (2)	0.02388 (9)
Zn1	0.18295 (5)	0.44768 (3)	0.72356 (2)	0.01825 (11)
Si1	0.20755 (13)	0.11080 (7)	0.36959 (6)	0.01815 (17)
Si2	0.29081 (13)	0.19038 (7)	0.00126 (6)	0.01876 (17)
N1	0.3265 (4)	0.3852 (2)	0.6019 (2)	0.0211 (5)
N2	0.5728 (4)	0.4903 (2)	0.17215 (19)	0.0188 (5)
C1	0.5162 (5)	0.4319 (3)	0.5905 (2)	0.0251 (6)
H1	0.579527	0.495898	0.638031	0.030*
C9	0.2785 (5)	0.1499 (3)	0.1859 (2)	0.0221 (6)
H9A	0.319184	0.225709	0.222588	0.027*
H9B	0.127944	0.134290	0.169839	0.027*
C10	0.3857 (5)	0.1284 (2)	0.0903 (2)	0.0206 (6)
H10A	0.364468	0.051314	0.059107	0.025*
H10B	0.535313	0.155339	0.105999	0.025*
C11	0.4132 (6)	0.1526 (3)	−0.1155 (3)	0.0291 (7)
H11A	0.348469	0.178332	−0.163340	0.044*
H11B	0.395268	0.075655	−0.140057	0.044*
H11C	0.560138	0.183835	−0.104471	0.044*
C12	0.0055 (5)	0.1505 (3)	−0.0225 (3)	0.0300 (7)
H12A	−0.041008	0.178965	−0.072628	0.045*
H12B	−0.058849	0.178144	0.037643	0.045*
H12C	−0.033317	0.073428	−0.044895	0.045*
C13	0.3555 (4)	0.3384 (2)	0.0570 (2)	0.0177 (5)
C14	0.2430 (5)	0.4065 (3)	0.0321 (2)	0.0214 (6)
H14	0.130060	0.378651	−0.016029	0.026*
C15	0.2954 (5)	0.5143 (3)	0.0771 (2)	0.0233 (6)
H15	0.219466	0.560577	0.060122	0.028*
C16	0.4601 (5)	0.5533 (2)	0.1470 (2)	0.0210 (6)
H16	0.494752	0.627136	0.178439	0.025*
C17	0.5198 (5)	0.3852 (2)	0.1279 (2)	0.0193 (5)
H17	0.598922	0.340795	0.146053	0.023*
C2	0.6227 (5)	0.3902 (3)	0.5118 (3)	0.0284 (7)
H2	0.757203	0.424652	0.505495	0.034*
C3	0.5296 (5)	0.2971 (3)	0.4423 (2)	0.0239 (6)
H3	0.600523	0.267856	0.387566	0.029*
C4	0.3325 (5)	0.2458 (2)	0.4519 (2)	0.0192 (5)
C5	0.2384 (5)	0.2944 (2)	0.5337 (2)	0.0196 (6)
H5	0.103813	0.261679	0.541876	0.024*
C6	−0.0741 (5)	0.1046 (3)	0.3501 (3)	0.0253 (6)
H6A	−0.139978	0.033687	0.309674	0.038*
H6B	−0.096958	0.156130	0.317310	0.038*
H6C	−0.133232	0.120667	0.413133	0.038*
C7	0.2577 (6)	0.0153 (3)	0.4333 (3)	0.0296 (7)
H7A	0.177913	−0.054853	0.398498	0.044*
H7B	0.217186	0.037456	0.499969	0.044*
H7C	0.404478	0.012956	0.434917	0.044*
C8	0.3300 (5)	0.0847 (2)	0.2514 (2)	0.0202 (5)
H8A	0.480997	0.098998	0.265646	0.024*
H8B	0.286597	0.008978	0.214817	0.024*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
I1	0.01598 (12)	0.02058 (13)	0.02297 (13)	−0.00243 (8)	0.00322 (8)	0.00066 (8)
I2	0.02429 (13)	0.01873 (13)	0.01943 (13)	−0.00750 (8)	0.00749 (8)	−0.00180 (8)
Zn1	0.01568 (17)	0.01609 (17)	0.01450 (17)	−0.00495 (12)	0.00393 (12)	−0.00377 (12)
Si1	0.0185 (4)	0.0162 (4)	0.0140 (3)	−0.0020 (3)	0.0017 (3)	−0.0012 (3)
Si2	0.0167 (4)	0.0176 (4)	0.0140 (3)	−0.0055 (3)	0.0015 (3)	−0.0023 (3)
N1	0.0173 (11)	0.0201 (12)	0.0165 (11)	−0.0059 (9)	0.0047 (9)	−0.0032 (9)
N2	0.0165 (11)	0.0169 (11)	0.0152 (10)	−0.0042 (9)	0.0034 (8)	−0.0030 (9)
C1	0.0202 (14)	0.0231 (14)	0.0214 (14)	−0.0087 (12)	0.0063 (11)	−0.0025 (12)
C9	0.0244 (14)	0.0237 (14)	0.0159 (12)	0.0058 (12)	0.0057 (11)	0.0013 (11)
C10	0.0185 (13)	0.0191 (13)	0.0161 (12)	−0.0039 (10)	0.0029 (10)	−0.0027 (10)
C11	0.0325 (17)	0.0271 (16)	0.0197 (14)	0.0001 (14)	0.0069 (13)	−0.0020 (12)
C12	0.0187 (14)	0.0339 (18)	0.0303 (17)	−0.0111 (13)	−0.0030 (12)	0.0089 (15)
C13	0.0156 (12)	0.0173 (12)	0.0133 (11)	−0.0034 (10)	0.0042 (9)	−0.0025 (9)
C14	0.0155 (12)	0.0250 (14)	0.0161 (12)	−0.0026 (11)	0.0026 (10)	−0.0017 (11)
C15	0.0223 (14)	0.0208 (14)	0.0220 (14)	0.0012 (11)	0.0055 (11)	0.0006 (11)
C16	0.0206 (13)	0.0166 (13)	0.0208 (13)	−0.0008 (11)	0.0051 (11)	0.0004 (10)
C17	0.0194 (13)	0.0162 (12)	0.0166 (12)	−0.0030 (10)	0.0024 (10)	0.0000 (10)
C2	0.0204 (14)	0.0298 (17)	0.0235 (15)	−0.0070 (13)	0.0076 (12)	−0.0028 (13)
C3	0.0183 (13)	0.0245 (15)	0.0203 (14)	−0.0038 (12)	0.0071 (11)	−0.0024 (12)
C4	0.0169 (12)	0.0191 (13)	0.0152 (12)	−0.0036 (10)	0.0020 (10)	−0.0006 (10)
C5	0.0158 (12)	0.0169 (13)	0.0184 (13)	−0.0053 (10)	0.0043 (10)	−0.0019 (10)
C6	0.0204 (14)	0.0238 (15)	0.0252 (15)	−0.0029 (12)	0.0025 (11)	0.0016 (12)
C7	0.0381 (19)	0.0221 (15)	0.0244 (15)	0.0004 (14)	−0.0008 (13)	0.0044 (12)
C8	0.0214 (13)	0.0211 (13)	0.0127 (12)	0.0014 (11)	0.0029 (10)	−0.0017 (10)

Geometric parameters (Å, º) top

I1—Zn1	2.5680 (7)	C11—H11C	0.9800
I2—Zn1	2.5688 (9)	C12—H12A	0.9800
Zn1—N1	2.051 (3)	C12—H12B	0.9800
Zn1—N2ⁱ	2.058 (3)	C12—H12C	0.9800
Si1—C7	1.859 (4)	C13—C17	1.396 (4)
Si1—C6	1.866 (4)	C13—C14	1.401 (5)
Si1—C8	1.874 (3)	C14—C15	1.386 (4)
Si1—C4	1.889 (3)	C14—H14	0.9500
Si2—C11	1.863 (4)	C15—C16	1.383 (5)
Si2—C12	1.867 (4)	C15—H15	0.9500
Si2—C10	1.877 (4)	C16—H16	0.9500
Si2—C13	1.890 (3)	C17—H17	0.9500
N1—C1	1.342 (4)	C2—C3	1.386 (5)
N1—C5	1.350 (4)	C2—H2	0.9500
N2—C16	1.346 (4)	C3—C4	1.398 (4)
N2—C17	1.353 (4)	C3—H3	0.9500
C1—C2	1.385 (5)	C4—C5	1.395 (4)
C1—H1	0.9500	C5—H5	0.9500
C9—C8	1.539 (5)	C6—H6A	0.9800
C9—C10	1.543 (4)	C6—H6B	0.9800
C9—H9A	0.9900	C6—H6C	0.9800
C9—H9B	0.9900	C7—H7A	0.9800
C10—H10A	0.9900	C7—H7B	0.9800
C10—H10B	0.9900	C7—H7C	0.9800
C11—H11A	0.9800	C8—H8A	0.9900
C11—H11B	0.9800	C8—H8B	0.9900

N1—Zn1—N2ⁱ	101.75 (11)	Si2—C12—H12C	109.5
N1—Zn1—I1	112.18 (9)	H12A—C12—H12C	109.5
N2ⁱ—Zn1—I1	105.99 (8)	H12B—C12—H12C	109.5
N1—Zn1—I2	103.93 (8)	C17—C13—C14	116.5 (3)
N2ⁱ—Zn1—I2	110.36 (8)	C17—C13—Si2	120.4 (2)
I1—Zn1—I2	121.03 (2)	C14—C13—Si2	123.1 (2)
C7—Si1—C6	110.83 (18)	C15—C14—C13	120.4 (3)
C7—Si1—C8	109.85 (17)	C15—C14—H14	119.8
C6—Si1—C8	111.23 (15)	C13—C14—H14	119.8
C7—Si1—C4	106.29 (16)	C16—C15—C14	119.0 (3)
C6—Si1—C4	109.39 (16)	C16—C15—H15	120.5
C8—Si1—C4	109.12 (14)	C14—C15—H15	120.5
C11—Si2—C12	109.74 (18)	N2—C16—C15	122.2 (3)
C11—Si2—C10	111.15 (17)	N2—C16—H16	118.9
C12—Si2—C10	110.25 (16)	C15—C16—H16	118.9
C11—Si2—C13	109.42 (16)	N2—C17—C13	123.7 (3)
C12—Si2—C13	107.79 (17)	N2—C17—H17	118.2
C10—Si2—C13	108.42 (14)	C13—C17—H17	118.2
C1—N1—C5	118.2 (3)	C1—C2—C3	118.8 (3)
C1—N1—Zn1	120.1 (2)	C1—C2—H2	120.6
C5—N1—Zn1	121.6 (2)	C3—C2—H2	120.6
C16—N2—C17	118.3 (3)	C2—C3—C4	120.6 (3)
C16—N2—Zn1ⁱ	120.8 (2)	C2—C3—H3	119.7
C17—N2—Zn1ⁱ	121.0 (2)	C4—C3—H3	119.7
N1—C1—C2	122.2 (3)	C5—C4—C3	116.1 (3)
N1—C1—H1	118.9	C5—C4—Si1	120.1 (2)
C2—C1—H1	118.9	C3—C4—Si1	123.4 (2)
C8—C9—C10	113.7 (3)	N1—C5—C4	124.1 (3)
C8—C9—H9A	108.8	N1—C5—H5	118.0
C10—C9—H9A	108.8	C4—C5—H5	118.0
C8—C9—H9B	108.8	Si1—C6—H6A	109.5
C10—C9—H9B	108.8	Si1—C6—H6B	109.5
H9A—C9—H9B	107.7	H6A—C6—H6B	109.5
C9—C10—Si2	113.8 (2)	Si1—C6—H6C	109.5
C9—C10—H10A	108.8	H6A—C6—H6C	109.5
Si2—C10—H10A	108.8	H6B—C6—H6C	109.5
C9—C10—H10B	108.8	Si1—C7—H7A	109.5
Si2—C10—H10B	108.8	Si1—C7—H7B	109.5
H10A—C10—H10B	107.7	H7A—C7—H7B	109.5
Si2—C11—H11A	109.5	Si1—C7—H7C	109.5
Si2—C11—H11B	109.5	H7A—C7—H7C	109.5
H11A—C11—H11B	109.5	H7B—C7—H7C	109.5
Si2—C11—H11C	109.5	C9—C8—Si1	115.0 (2)
H11A—C11—H11C	109.5	C9—C8—H8A	108.5
H11B—C11—H11C	109.5	Si1—C8—H8A	108.5
Si2—C12—H12A	109.5	C9—C8—H8B	108.5
Si2—C12—H12B	109.5	Si1—C8—H8B	108.5
H12A—C12—H12B	109.5	H8A—C8—H8B	107.5

C5—N1—C1—C2	−0.1 (6)	C14—C13—C17—N2	0.2 (4)
Zn1—N1—C1—C2	177.1 (3)	Si2—C13—C17—N2	−178.8 (2)
C8—C9—C10—Si2	170.5 (2)	N1—C1—C2—C3	0.3 (6)
C11—Si2—C10—C9	−175.7 (2)	C1—C2—C3—C4	−0.6 (6)
C12—Si2—C10—C9	−53.8 (3)	C2—C3—C4—C5	0.7 (5)
C13—Si2—C10—C9	64.0 (2)	C2—C3—C4—Si1	−172.2 (3)
C11—Si2—C13—C17	−96.0 (3)	C7—Si1—C4—C5	−77.1 (3)
C12—Si2—C13—C17	144.7 (2)	C6—Si1—C4—C5	42.6 (3)
C10—Si2—C13—C17	25.4 (3)	C8—Si1—C4—C5	164.5 (3)
C11—Si2—C13—C14	85.1 (3)	C7—Si1—C4—C3	95.4 (3)
C12—Si2—C13—C14	−34.2 (3)	C6—Si1—C4—C3	−144.9 (3)
C10—Si2—C13—C14	−153.5 (2)	C8—Si1—C4—C3	−23.0 (3)
C17—C13—C14—C15	−0.3 (4)	C1—N1—C5—C4	0.2 (5)
Si2—C13—C14—C15	178.6 (2)	Zn1—N1—C5—C4	−176.9 (3)
C13—C14—C15—C16	−0.1 (5)	C3—C4—C5—N1	−0.5 (5)
C17—N2—C16—C15	−1.0 (5)	Si1—C4—C5—N1	172.6 (3)
Zn1ⁱ—N2—C16—C15	179.8 (2)	C10—C9—C8—Si1	178.6 (2)
C14—C15—C16—N2	0.8 (5)	C7—Si1—C8—C9	173.1 (2)
C16—N2—C17—C13	0.5 (4)	C6—Si1—C8—C9	50.0 (3)
Zn1ⁱ—N2—C17—C13	179.7 (2)	C4—Si1—C8—C9	−70.7 (3)

Symmetry code: (i) −x+1, −y+1, −z+1.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C1—H1···I1ⁱⁱ	0.95	3.08	3.805 (4)	135
C15—H15···I2ⁱⁱⁱ	0.95	3.27	3.756 (3)	114

Symmetry codes: (ii) x+1, y, z; (iii) −x, −y+1, −z+1.

Funding information

This work was supported by the National Research Foundation of Korea (NRF) grant funded by 2021R1I1A3059982 (YAL) and Ministry of Science and ICT [RS-2022–00164805 (DK)]. The X-ray crystallography at the PLS-II 2D SMC beamline was supported in part by MSIP and POSTECH.

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