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ISSN: 2414-3146

4,4′-[(1E,1′E)-(2-Chloro­pyrimidine-4,6-di­yl)bis­(ethene-2,1-di­yl)]bis­­(N,N-di­ethyl­aniline)

CROSSMARK_Color_square_no_text.svg

aDepartment of Chemistry, Anhui University, Hefei 230039, People's Republic of China, and bKey Laboratory of Functional Inorganic Materials Chemistry, Hefei 230039, People's Republic of China
*Correspondence e-mail: zhangqiong.314@163.com

Edited by D.-J. Xu, Zhejiang University (Yuquan Campus), China (Received 2 September 2016; accepted 8 October 2016; online 18 October 2016)

In the title mol­ecule, C28H33ClN4, the central pyrimidine ring is twisted with respect to the two benzene rings, making dihedral angles of 13.56 (19) and 23.1 (2)°. In the crystal, weak C—H⋯π inter­actions link the mol­ecules into supra­molecular chains propagating along the c-axis direction.

3D view (loading...)
[Scheme 3D1]
Chemical scheme
[Scheme 1]

Structure description

Pyrimidine derivatives are considered important compounds because of their wide range of biological activities, and also because of their high electron affinity and good planarity, making them suitable building blocks for the construction of chromophores for non-linear optical materials (Wang et al., 2014[Wang, H., Zhang, Q., Zhang, J., Li, L., Zhang, Q., Li, S.-L., Zhang, S.-Y., Wu, J.-Y. & Tian, Y.-P. (2014). Dyes Pigments, 102, 263-272.]). The pyrimidine ring also has well known reactivity with an aromatic aldehyde under solvent-free conditions (Li et al., 2009[Li, L., Tian, Y.-P., Yang, J.-X., Sun, P.-P., Wu, J.-Y., Zhou, H.-P., Zhang, S.-Y., Jin, B.-K., Xing, X.-J., Wang, C., Li, M., Cheng, G., Tang, H., Huang, W., Tao, X. & Jiang, M. (2009). Chem. Asian J. 4, 668-680.]). Moreover, pyrimidine derivatives are excellent candidates for sensor materials with two-photon properties as they involve two N atoms in positions 2 and 4, forming an effective coordinating dentate for metal cations that can be applied to generate various useful materials (Zhang et al., 2016[Zhang, Q., Tian, X.-H., Wang, H., Hu, Z.-J., Wu, J.-Y., Zhou, H.-P., Zhang, S.-Y., Yang, J.-X., Sun, Z.-Q., Tian, Y.-P. & Uvdal, K. (2016). Sens. Actuators B Chem. 222, 574-578.]).

In the title compound (Fig. 1[link]), the pyrimidine ring is nearly planar [maximum deviation of 0.008 (4) Å for atom C14) and is twisted with respect to the C5–C10 and C18–C23 benzene rings, making dihedral angles of 13.56 (19) and 23.1 (2)°, respectively.

[Figure 1]
Figure 1
The mol­ecular structure with the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level.

In the crystal, weak C—H⋯π inter­actions (Table 1[link]) link the mol­ecules into supra­molecular chains propagating along the c-axis direction.

Table 1
Hydrogen-bond geometry (Å, °)

Cg3 is the centroid of the C18–C23 ring.

D—H⋯A D—H H⋯A DA D—H⋯A
C3—H3ACg3i 0.97 2.73 3.606 (8) 151
Symmetry code: (i) [x, -y+{\script{1\over 2}}, z-{\script{1\over 2}}].

Synthesis and crystallization

A mixture of 4-(di­ethyl­amino)­benzaldehyde (0.39 g, 2.20 mmol), 2-chloro-4,6-dimethyl pyrimidine (0.14 g, 1 mmol) and tBuOK (0.56 g, 5 mmol) was milled vigorously for about 10 min. The reaction was monitored by TLC. After the reaction was completed, the mixture was dispersed in water. The solution was extracted with CH2Cl2 several times. The organic layer was washed with water, saturated brine and dried over anhydrous MgSO4. After removing solvent under reduced pressure, the crude product was obtained and purified by flash column chromatography (silica, 8:1 petroleum ether:ethyl acetate) to obtain red crystals. Yield: 60%. 1H NMR (400 MHz, CDCl3-d6)1.42 (t, 12H), 3.41 (q, 8H), 6.66 (d, 4H), 7.47 (d, 4H),6.68 (d, 2H), 7.81 (d, 2H), 6.59 (s, 1H).

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2[link].

Table 2
Experimental details

Crystal data
Chemical formula C28H33ClN4
Mr 461.03
Crystal system, space group Monoclinic, P21/c
Temperature (K) 296
a, b, c (Å) 11.791 (5), 15.005 (5), 14.711 (5)
β (°) 92.716 (5)
V3) 2599.8 (17)
Z 4
Radiation type Mo Kα
μ (mm−1) 0.17
Crystal size (mm) 0.10 × 0.10 × 0.10
 
Data collection
Diffractometer Bruker SMART 1000 CCD area-detector
No. of measured, independent and observed [I > 2σ(I)] reflections 14693, 4334, 1777
Rint 0.087
(sin θ/λ)max−1) 0.595
 
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.057, 0.203, 0.91
No. of reflections 4334
No. of parameters 302
H-atom treatment H-atom parameters constrained
Δρmax, Δρmin (e Å−3) 0.14, −0.18
Computer programs: SMART and SAINT (Bruker, 2002[Bruker (2002). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]), SHELXS97, SHELXL97 and SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]).

Structural data


Computing details top

Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

4,4'-[(1E,1'E)-(2-Chloropyrimidine-4,6-diyl)bis(ethene-2,1-diyl)]bis(N,N-diethylaniline) top
Crystal data top
C28H33ClN4F(000) = 984
Mr = 461.03Dx = 1.178 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 1048 reflections
a = 11.791 (5) Åθ = 2.2–17.4°
b = 15.005 (5) ŵ = 0.17 mm1
c = 14.711 (5) ÅT = 296 K
β = 92.716 (5)°Prism, red
V = 2599.8 (17) Å30.1 × 0.1 × 0.1 mm
Z = 4
Data collection top
Bruker SMART 1000 CCD area-detector
diffractometer
1777 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.087
Graphite monochromatorθmax = 25.0°, θmin = 1.9°
phi and ω scansh = 1414
14693 measured reflectionsk = 1717
4334 independent reflectionsl = 1615
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.057Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.203H-atom parameters constrained
S = 0.91 w = 1/[σ2(Fo2) + (0.1P)2]
where P = (Fo2 + 2Fc2)/3
4334 reflections(Δ/σ)max < 0.001
302 parametersΔρmax = 0.14 e Å3
0 restraintsΔρmin = 0.18 e Å3
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. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > 2sigma(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Cl10.23269 (13)0.36886 (9)1.30455 (8)0.0911 (5)
C80.1371 (3)0.5278 (3)0.8928 (3)0.0512 (11)
N20.2846 (3)0.2363 (2)1.2017 (2)0.0622 (10)
N40.4462 (3)0.3125 (2)1.0323 (3)0.0667 (10)
C170.3370 (3)0.0536 (3)1.0462 (3)0.0589 (12)
H170.31430.07970.99100.071*
C150.2972 (3)0.1987 (3)1.1188 (3)0.0544 (11)
C140.2743 (3)0.2474 (3)1.0400 (3)0.0545 (11)
H140.28450.22210.98320.065*
C220.4249 (4)0.2226 (3)1.0348 (3)0.0586 (12)
C160.3342 (4)0.1056 (3)1.1189 (3)0.0592 (12)
H160.35760.08091.17460.071*
C180.3711 (4)0.0388 (3)1.0425 (3)0.0577 (12)
C130.2362 (3)0.3337 (3)1.0470 (3)0.0524 (11)
C280.2489 (3)0.3195 (3)1.1987 (3)0.0568 (11)
C110.1623 (3)0.4685 (3)0.9688 (3)0.0538 (11)
H110.14310.48921.02560.065*
N10.2235 (3)0.3717 (2)1.1294 (3)0.0576 (9)
C90.0828 (3)0.6091 (3)0.9065 (3)0.0609 (12)
H90.05910.62250.96440.073*
C230.4283 (4)0.0820 (3)1.1142 (3)0.0632 (12)
H230.44920.04961.16620.076*
N30.0790 (4)0.7150 (3)0.6822 (3)0.0945 (14)
C70.1674 (4)0.5118 (3)0.8045 (3)0.0622 (12)
H70.20200.45780.79170.075*
C200.3713 (4)0.1784 (3)0.9612 (3)0.0661 (13)
H200.35190.21000.90840.079*
C50.0961 (4)0.6541 (3)0.7508 (3)0.0686 (13)
C100.0631 (4)0.6696 (3)0.8384 (3)0.0679 (13)
H100.02650.72270.85120.081*
C120.2097 (3)0.3877 (3)0.9671 (3)0.0546 (11)
H120.22690.36450.91080.066*
C60.1489 (4)0.5712 (3)0.7351 (3)0.0712 (14)
H60.17130.55720.67710.085*
C260.3941 (4)0.3692 (3)0.9608 (3)0.0737 (14)
H26A0.32110.34410.94130.088*
H26B0.38060.42780.98580.088*
C210.4554 (4)0.1709 (3)1.1112 (3)0.0630 (12)
H210.49460.19711.16070.076*
C190.3467 (4)0.0892 (3)0.9652 (3)0.0664 (13)
H190.31240.06170.91430.080*
C240.4983 (4)0.3591 (3)1.1105 (3)0.0738 (14)
H24A0.55640.32131.13910.089*
H24B0.53500.41261.08960.089*
C270.4660 (5)0.3787 (3)0.8790 (3)0.0968 (17)
H27A0.48100.32090.85450.145*
H27B0.42620.41420.83350.145*
H27C0.53640.40720.89700.145*
C20.0210 (5)0.8003 (4)0.6974 (4)0.107 (2)
H2A0.03840.79080.73980.128*
H2B0.01490.82020.64020.128*
C250.4139 (5)0.3846 (3)1.1809 (4)0.1001 (18)
H25A0.37840.33191.20310.150*
H25B0.45290.41501.23060.150*
H25C0.35700.42331.15360.150*
C30.1174 (6)0.6985 (5)0.5922 (5)0.124 (3)
H3A0.18830.66570.59700.149*
H3B0.13210.75510.56310.149*
C40.0333 (7)0.6472 (6)0.5340 (5)0.165 (3)
H4A0.01480.59280.56420.248*
H4B0.06540.63370.47680.248*
H4C0.03420.68220.52360.248*
C10.0994 (6)0.8730 (4)0.7342 (6)0.157 (3)
H1A0.13690.85340.79000.235*
H1B0.05600.92570.74540.235*
H1C0.15500.88610.69050.235*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cl10.1296 (12)0.0957 (10)0.0472 (8)0.0198 (8)0.0046 (7)0.0099 (7)
C80.051 (3)0.055 (3)0.047 (3)0.006 (2)0.001 (2)0.002 (2)
N20.075 (3)0.061 (2)0.051 (3)0.0008 (19)0.000 (2)0.003 (2)
N40.077 (3)0.059 (2)0.064 (3)0.000 (2)0.001 (2)0.006 (2)
C170.069 (3)0.061 (3)0.046 (3)0.010 (2)0.002 (2)0.004 (2)
C150.059 (3)0.056 (3)0.048 (3)0.009 (2)0.003 (2)0.000 (2)
C140.068 (3)0.051 (3)0.044 (3)0.004 (2)0.003 (2)0.002 (2)
C220.057 (3)0.058 (3)0.062 (3)0.004 (2)0.011 (2)0.000 (3)
C160.073 (3)0.057 (3)0.047 (3)0.008 (2)0.000 (2)0.009 (2)
C180.072 (3)0.050 (3)0.051 (3)0.003 (2)0.004 (2)0.004 (2)
C130.054 (3)0.063 (3)0.040 (3)0.008 (2)0.001 (2)0.003 (2)
C280.063 (3)0.071 (3)0.036 (3)0.005 (2)0.002 (2)0.005 (2)
C110.055 (3)0.056 (3)0.050 (3)0.007 (2)0.001 (2)0.002 (2)
N10.061 (2)0.066 (2)0.046 (3)0.0033 (18)0.0008 (19)0.002 (2)
C90.060 (3)0.063 (3)0.060 (3)0.001 (2)0.008 (2)0.002 (2)
C230.077 (3)0.057 (3)0.055 (3)0.002 (2)0.003 (2)0.002 (2)
N30.092 (3)0.105 (3)0.089 (4)0.037 (3)0.027 (3)0.051 (3)
C70.066 (3)0.071 (3)0.050 (3)0.009 (2)0.008 (2)0.011 (2)
C200.081 (3)0.066 (3)0.051 (3)0.006 (3)0.000 (3)0.009 (3)
C50.056 (3)0.080 (3)0.070 (4)0.013 (2)0.013 (3)0.020 (3)
C100.067 (3)0.057 (3)0.080 (4)0.011 (2)0.008 (3)0.008 (3)
C120.057 (3)0.062 (3)0.045 (3)0.007 (2)0.002 (2)0.003 (2)
C60.074 (3)0.091 (3)0.050 (3)0.016 (3)0.015 (3)0.018 (3)
C260.069 (3)0.068 (3)0.084 (4)0.009 (2)0.003 (3)0.007 (3)
C210.072 (3)0.059 (3)0.057 (3)0.002 (2)0.008 (2)0.001 (2)
C190.080 (3)0.068 (3)0.051 (3)0.002 (3)0.004 (3)0.001 (3)
C240.070 (3)0.061 (3)0.090 (4)0.009 (2)0.003 (3)0.008 (3)
C270.099 (4)0.104 (4)0.087 (4)0.009 (3)0.003 (3)0.034 (3)
C20.074 (4)0.106 (4)0.141 (5)0.034 (4)0.015 (4)0.058 (4)
C250.098 (4)0.108 (4)0.095 (4)0.013 (3)0.011 (3)0.026 (3)
C30.106 (5)0.168 (6)0.100 (6)0.054 (5)0.034 (4)0.078 (5)
C40.151 (7)0.262 (10)0.084 (6)0.068 (7)0.010 (5)0.029 (6)
C10.100 (5)0.113 (5)0.257 (10)0.000 (4)0.014 (6)0.061 (6)
Geometric parameters (Å, º) top
Cl1—C281.743 (4)C7—H70.9300
C8—C71.385 (5)C20—C191.371 (5)
C8—C91.397 (5)C20—H200.9300
C8—C111.448 (5)C5—C101.384 (6)
N2—C281.317 (5)C5—C61.414 (6)
N2—C151.358 (5)C10—H100.9300
N4—C221.373 (5)C12—H120.9300
N4—C241.457 (5)C6—H60.9300
N4—C261.464 (5)C26—C271.512 (6)
C17—C161.325 (5)C26—H26A0.9700
C17—C181.446 (5)C26—H26B0.9700
C17—H170.9300C21—H210.9300
C15—C141.386 (5)C19—H190.9300
C15—C161.463 (5)C24—C251.519 (6)
C14—C131.376 (5)C24—H24A0.9700
C14—H140.9300C24—H24B0.9700
C22—C201.395 (6)C27—H27A0.9600
C22—C211.399 (5)C27—H27B0.9600
C16—H160.9300C27—H27C0.9600
C18—C191.384 (5)C2—C11.514 (8)
C18—C231.387 (5)C2—H2A0.9700
C13—N11.355 (5)C2—H2B0.9700
C13—C121.449 (5)C25—H25A0.9600
C28—N11.309 (5)C25—H25B0.9600
C11—C121.336 (5)C25—H25C0.9600
C11—H110.9300C3—C41.492 (9)
C9—C101.363 (5)C3—H3A0.9700
C9—H90.9300C3—H3B0.9700
C23—C211.373 (5)C4—H4A0.9600
C23—H230.9300C4—H4B0.9600
N3—C51.369 (5)C4—H4C0.9600
N3—C31.442 (7)C1—H1A0.9600
N3—C21.473 (6)C1—H1B0.9600
C7—C61.365 (5)C1—H1C0.9600
C7—C8—C9115.3 (4)C13—C12—H12117.7
C7—C8—C11124.4 (4)C7—C6—C5120.6 (4)
C9—C8—C11120.3 (4)C7—C6—H6119.7
C28—N2—C15114.4 (4)C5—C6—H6119.7
C22—N4—C24121.4 (4)N4—C26—C27113.3 (4)
C22—N4—C26121.2 (4)N4—C26—H26A108.9
C24—N4—C26115.9 (4)C27—C26—H26A108.9
C16—C17—C18127.8 (4)N4—C26—H26B108.9
C16—C17—H17116.1C27—C26—H26B108.9
C18—C17—H17116.1H26A—C26—H26B107.7
N2—C15—C14120.4 (4)C23—C21—C22120.9 (4)
N2—C15—C16116.2 (4)C23—C21—H21119.6
C14—C15—C16123.4 (4)C22—C21—H21119.6
C13—C14—C15119.0 (4)C20—C19—C18122.1 (4)
C13—C14—H14120.5C20—C19—H19119.0
C15—C14—H14120.5C18—C19—H19119.0
N4—C22—C20121.6 (4)N4—C24—C25113.2 (4)
N4—C22—C21121.7 (4)N4—C24—H24A108.9
C20—C22—C21116.7 (4)C25—C24—H24A108.9
C17—C16—C15125.5 (4)N4—C24—H24B108.9
C17—C16—H16117.3C25—C24—H24B108.9
C15—C16—H16117.3H24A—C24—H24B107.7
C19—C18—C23116.4 (4)C26—C27—H27A109.5
C19—C18—C17120.5 (4)C26—C27—H27B109.5
C23—C18—C17123.0 (4)H27A—C27—H27B109.5
N1—C13—C14120.9 (4)C26—C27—H27C109.5
N1—C13—C12117.5 (4)H27A—C27—H27C109.5
C14—C13—C12121.6 (4)H27B—C27—H27C109.5
N1—C28—N2130.8 (4)N3—C2—C1113.6 (5)
N1—C28—Cl1114.2 (3)N3—C2—H2A108.8
N2—C28—Cl1114.9 (4)C1—C2—H2A108.8
C12—C11—C8127.9 (4)N3—C2—H2B108.8
C12—C11—H11116.1C1—C2—H2B108.8
C8—C11—H11116.1H2A—C2—H2B107.7
C28—N1—C13114.5 (4)C24—C25—H25A109.5
C10—C9—C8122.5 (4)C24—C25—H25B109.5
C10—C9—H9118.7H25A—C25—H25B109.5
C8—C9—H9118.7C24—C25—H25C109.5
C21—C23—C18122.4 (4)H25A—C25—H25C109.5
C21—C23—H23118.8H25B—C25—H25C109.5
C18—C23—H23118.8N3—C3—C4112.7 (6)
C5—N3—C3121.4 (4)N3—C3—H3A109.0
C5—N3—C2121.5 (5)C4—C3—H3A109.0
C3—N3—C2117.1 (4)N3—C3—H3B109.0
C6—C7—C8123.3 (4)C4—C3—H3B109.0
C6—C7—H7118.4H3A—C3—H3B107.8
C8—C7—H7118.4C3—C4—H4A109.5
C19—C20—C22121.4 (4)C3—C4—H4B109.5
C19—C20—H20119.3H4A—C4—H4B109.5
C22—C20—H20119.3C3—C4—H4C109.5
N3—C5—C10122.4 (4)H4A—C4—H4C109.5
N3—C5—C6121.2 (4)H4B—C4—H4C109.5
C10—C5—C6116.4 (4)C2—C1—H1A109.5
C9—C10—C5121.9 (4)C2—C1—H1B109.5
C9—C10—H10119.1H1A—C1—H1B109.5
C5—C10—H10119.1C2—C1—H1C109.5
C11—C12—C13124.5 (4)H1A—C1—H1C109.5
C11—C12—H12117.7H1B—C1—H1C109.5
Hydrogen-bond geometry (Å, º) top
Cg3 is the centroid of the C18–C23 ring.
D—H···AD—HH···AD···AD—H···A
C3—H3A···Cg3i0.972.733.606 (8)151
Symmetry code: (i) x, y+1/2, z1/2.
 

Acknowledgements

This work was supported by the National Natural Science Foundation of China (21501001).

References

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