Bis{μ-1,3-bis­[(2-methyl-1H-benzimid­azol-1-yl)meth­yl]benzene-κ2N3:N3′}bis­(diiodidocadmium)

Hu, J.; Liu, J.; Zhao, J.

doi:10.1107/S1600536811042334

metal-organic compounds

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ISSN: 2056-9890

Volume 67| Part 11| November 2011| Page m1566

doi:10.1107/S1600536811042334

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Bis{μ-1,3-bis[(2-methyl-1H-benzimidazol-1-yl)methyl]benzene-κ²N³:N^3′}bis(diiodidocadmium)

Jiyong Hu,^a ^* Junhong Liu ^b and Jin'an Zhao ^a

^aDepartment of Chemistry and Chemical Engineering, Henan University of Urban Construction, Henan 467036, People's Republic of China, and ^bDepartment of Bioengineering, Henan University of Urban Construction, Henan 467036, People's Republic of China
^*Correspondence e-mail: hujiyong@hncj.edu.cn

(Received 28 August 2011; accepted 13 October 2011; online 22 October 2011)

In the title compound, [Cd₂I₄(C₂₄H₂₂N₄)₂], the 1,3-bis[(2-methyl-1H-benzimidazol-1-yl)methyl]benzene ligand bridges two CdI₂ units, forming a centrosymmetric dinuclear complex. The Cd^II atom adopts a distorted tetrahedral coordination geometry. In the crystal, complex molecules are linked into columns parallel to [101] by π–π stacking interactions, with centroid–centroid distances of 3.558 (2) Å.

Related literature

For general background to the synthesis and properties of benzimidazole metal complexes, see: Wang et al. (2006 ); Yu et al. (2010 ); Li et al. (2011 ); Dobrzanska et al. (2006 ). For related structures, see: Raehm et al. (2003 ); Zhao et al. (2009 ).

Experimental

Crystal data

[Cd₂I₄(C₂₄H₂₂N₄)₂]
M_r = 1465.33
Triclinic, $[P \overline 1]$
a = 9.3968 (19) Å
b = 11.286 (2) Å
c = 11.703 (2) Å
α = 87.20 (3)°
β = 84.60 (3)°
γ = 86.03 (3)°
V = 1231.5 (4) Å³
Z = 1
Mo Kα radiation
μ = 3.41 mm⁻¹
T = 293 K
0.20 × 0.10 × 0.08 mm

Data collection

Rigaku Saturn 724 CCD diffractometer
Absorption correction: multi-scan (CrystalClear; Rigaku/MSC, 2006 ) T_min = 0.549, T_max = 0.772
13506 measured reflections
4836 independent reflections
4153 reflections with I > 2σ(I)
R_int = 0.028

Refinement

R[F² > 2σ(F²)] = 0.037
wR(F²) = 0.080
S = 1.05
4836 reflections
282 parameters
H-atom parameters constrained
Δρ_max = 0.79 e Å⁻³
Δρ_min = −1.22 e Å⁻³

Data collection: CrystalClear (Rigaku/MSC, 2006); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CrystalStructure (Rigaku/MSC, 2006); software used to prepare material for publication: CrystalStructure.

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811042334/rz2634sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536811042334/rz2634Isup2.hkl

checkCIF report

Comment top

Metallamacrocycle species possess cavities whose size can be readily modified for selective encapsulating properties and other functionalities. Among others, benzimidazole and its derivatives have become promising building blocks resulting from their wide-ranging biological activities, interesting photochemical and photophysical properties, versatile coordination modes according to the different geometric requirements of metal centers, and potential ability to form supramolecular aggregates with unique structural topologies and interesting properties through π–π aromatic stacking and hydrogen-bonding interactions (Wang et al., 2006; Yu et al., 2010; Li et al., 2011; Dobrzanska et al., 2006).

The asymmetric unit of the title compound consists of a CdI₂ unit and a 2-methyl-1Hbenzimidazol-1-yl)methyl]benzene molecule, where the ligand bridges two metal atoms forming a centrosymmetric dinuclear complex molecule (Fig. 1). The separation between the metal atoms is 13.373 (4) Å, and the potential accessible volume estimated by PLATON (Spek, 2009) is 3.9% of the total crystal volume. The dihedral angles formed by the benzene ring with the benzimidazole rings are 74.73 (13) and 82.56 (14)°. Because of the presence of the methyl groups and coordination requirement of the metal, the ligand assumes a remarkably different conformation with respect to those observed in the related Zn (Zhao et al., 2009) and Ag (Raehm et al., 2003) dinuclear complexes. In the crystal packing, complex molecules are interact through π–π stacking interactions to form into columns parallel to the [101] direction (Cg1···Cg1ⁱ = 3.558 (2) Å; Cg1 is the centroid of the C19–C24 ring; symmetry code: (i) -x, -y, -z).

Related literature top

For general background to the synthesis and properties of benzimidazole metal complexes, see: Wang et al. (2006); Yu et al. (2010); Li et al. (2011); Dobrzanska et al. (2006). For related structures, see: Raehm et al. (2003); Zhao et al. (2009).

Experimental top

To a solution of CdI₂ (0.02 mmol, 0.0073 g) in methanol (5 ml) an equivalent amount of the ligand 2-methyl-1H-benzimidazol-1-yl)methyl]benzene in DMF (1 ml) was added. After three weeks, stick-shaped colourless crystals were obtained on slow evaporation of the solvents at room temperature.

Computing details top

Data collection: CrystalClear (Rigaku/MSC, 2006); cell refinement: CrystalClear (Rigaku/MSC, 2006); data reduction: CrystalClear (Rigaku/MSC, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CrystalStructure (Rigaku/MSC, 2006); software used to prepare material for publication: CrystalStructure (Rigaku/MSC, 2006).

Figures top

Fig. 1. The molecular structure of the title complex, showing 30% probability displacement ellipsoids. Hydrogen atoms are omitted for clarity. Atoms labelled with suffix A are generated by the symmetry operation (1-x, -y, 1-z).

Bis{µ-1,3-bis[(2-methyl-1H-benzimidazol-1-yl)methyl]benzene- κ²N³:N^3'}bis(diiodidocadmium) top

Crystal data top

[Cd₂I₄(C₂₄H₂₂N₄)₂]	Z = 1
M_r = 1465.33	F(000) = 696
Triclinic, P1	D_x = 1.976 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 9.3968 (19) Å	Cell parameters from 7057 reflections
b = 11.286 (2) Å	θ = 2.2–26°
c = 11.703 (2) Å	µ = 3.41 mm⁻¹
α = 87.20 (3)°	T = 293 K
β = 84.60 (3)°	Stick, colourless
γ = 86.03 (3)°	0.20 × 0.10 × 0.08 mm
V = 1231.5 (4) Å³

Data collection top

Rigaku Saturn 724 CCD diffractometer	4836 independent reflections
Radiation source: fine-focus sealed tube	4153 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.028
dtprofit.ref scans	θ_max = 26.0°, θ_min = 2.2°
Absorption correction: multi-scan (CrystalClear; Rigaku/MSC, 2006)	h = −11→11
T_min = 0.549, T_max = 0.772	k = −13→13
13506 measured reflections	l = −14→13

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)] = 0.037	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.080	H-atom parameters constrained
S = 1.05	w = 1/[σ²(F_o²) + (0.0315P)² + 1.6758P] where P = (F_o² + 2F_c²)/3
4836 reflections	(Δ/σ)_max < 0.001
282 parameters	Δρ_max = 0.79 e Å⁻³
0 restraints	Δρ_min = −1.22 e Å⁻³

Crystal data top

[Cd₂I₄(C₂₄H₂₂N₄)₂]	γ = 86.03 (3)°
M_r = 1465.33	V = 1231.5 (4) Å³
Triclinic, P1	Z = 1
a = 9.3968 (19) Å	Mo Kα radiation
b = 11.286 (2) Å	µ = 3.41 mm⁻¹
c = 11.703 (2) Å	T = 293 K
α = 87.20 (3)°	0.20 × 0.10 × 0.08 mm
β = 84.60 (3)°

Data collection top

Rigaku Saturn 724 CCD diffractometer	4836 independent reflections
Absorption correction: multi-scan (CrystalClear; Rigaku/MSC, 2006)	4153 reflections with I > 2σ(I)
T_min = 0.549, T_max = 0.772	R_int = 0.028
13506 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.037	0 restraints
wR(F²) = 0.080	H-atom parameters constrained
S = 1.05	Δρ_max = 0.79 e Å⁻³
4836 reflections	Δρ_min = −1.22 e Å⁻³
282 parameters

Special details top

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

	x	y	z	U_iso*/U_eq
I1	0.09798 (4)	−0.51952 (3)	0.15611 (4)	0.06468 (14)
I2	0.46486 (4)	−0.30519 (3)	−0.08378 (3)	0.05247 (11)
Cd1	0.29674 (3)	−0.35597 (3)	0.11355 (3)	0.03755 (10)
N1	0.5844 (4)	0.3627 (3)	0.7254 (3)	0.0343 (8)
N2	0.4245 (4)	0.3662 (3)	0.5973 (3)	0.0355 (8)
N3	0.1485 (4)	0.0178 (3)	0.1876 (3)	0.0338 (8)
N4	0.1853 (4)	−0.1711 (3)	0.1419 (3)	0.0325 (8)
C1	0.3315 (5)	0.4102 (4)	0.7993 (4)	0.0426 (11)
H1A	0.3686	0.4039	0.8732	0.064*
H1B	0.2567	0.3566	0.7982	0.064*
H1C	0.2936	0.4902	0.7848	0.064*
C2	0.4477 (4)	0.3794 (4)	0.7095 (4)	0.0313 (9)
C3	0.6559 (5)	0.3380 (4)	0.6190 (4)	0.0368 (10)
C4	0.8009 (5)	0.3151 (5)	0.5857 (4)	0.0488 (13)
H4	0.8689	0.3117	0.6388	0.059*
C5	0.8393 (6)	0.2978 (5)	0.4723 (5)	0.0556 (14)
H5	0.9358	0.2835	0.4479	0.067*
C6	0.7390 (6)	0.3008 (5)	0.3916 (5)	0.0586 (15)
H6	0.7698	0.2883	0.3151	0.070*
C7	0.5959 (6)	0.3221 (5)	0.4231 (4)	0.0498 (13)
H7	0.5284	0.3240	0.3696	0.060*
C8	0.5564 (5)	0.3404 (4)	0.5374 (4)	0.0366 (10)
C17	0.3970 (5)	−0.0719 (5)	0.1933 (5)	0.0533 (14)
H17A	0.4102	−0.0909	0.2726	0.080*
H17B	0.4268	0.0067	0.1731	0.080*
H17C	0.4533	−0.1281	0.1461	0.080*
C18	0.2443 (5)	−0.0768 (4)	0.1750 (4)	0.0350 (10)
C19	0.0187 (5)	−0.0157 (4)	0.1590 (3)	0.0312 (9)
C20	−0.1133 (5)	0.0466 (4)	0.1514 (4)	0.0388 (11)
H20	−0.1285	0.1256	0.1711	0.047*
C21	−0.2197 (5)	−0.0141 (5)	0.1137 (4)	0.0475 (12)
H21	−0.3098	0.0245	0.1087	0.057*
C22	−0.1972 (5)	−0.1309 (5)	0.0826 (4)	0.0436 (12)
H22	−0.2719	−0.1683	0.0558	0.052*
C23	−0.0667 (5)	−0.1936 (4)	0.0904 (4)	0.0372 (10)
H23	−0.0523	−0.2724	0.0698	0.045*
C24	0.0422 (4)	−0.1341 (4)	0.1302 (3)	0.0290 (9)
C16	0.1781 (6)	0.1346 (4)	0.2239 (4)	0.0428 (11)
H16A	0.1005	0.1912	0.2050	0.051*
H16B	0.2651	0.1594	0.1808	0.051*
C14	0.1954 (5)	0.1390 (4)	0.3512 (4)	0.0336 (10)
C15	0.2342 (5)	0.2456 (4)	0.3911 (4)	0.0350 (10)
H15	0.2492	0.3096	0.3394	0.042*
C10	0.2508 (5)	0.2582 (4)	0.5056 (4)	0.0364 (10)
C11	0.2293 (6)	0.1621 (5)	0.5816 (4)	0.0541 (14)
H11	0.2393	0.1692	0.6592	0.065*
C12	0.1935 (7)	0.0564 (5)	0.5430 (4)	0.0638 (17)
H12	0.1817	−0.0087	0.5941	0.077*
C13	0.1748 (6)	0.0463 (5)	0.4277 (4)	0.0497 (13)
H13	0.1478	−0.0251	0.4026	0.060*
C9	0.2880 (5)	0.3757 (4)	0.5458 (4)	0.0412 (11)
H9A	0.2934	0.4329	0.4812	0.049*
H9B	0.2127	0.4048	0.6019	0.049*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
I1	0.0557 (2)	0.0445 (2)	0.0974 (3)	−0.01214 (17)	−0.0278 (2)	0.0134 (2)
I2	0.0586 (2)	0.0599 (2)	0.0386 (2)	−0.00834 (17)	0.00143 (15)	−0.00368 (16)
Cd1	0.03768 (19)	0.0418 (2)	0.03441 (19)	−0.00319 (15)	−0.00878 (14)	−0.00293 (15)
N1	0.031 (2)	0.043 (2)	0.0292 (19)	−0.0044 (16)	−0.0060 (15)	−0.0012 (16)
N2	0.037 (2)	0.038 (2)	0.034 (2)	−0.0047 (16)	−0.0103 (16)	−0.0060 (17)
N3	0.038 (2)	0.036 (2)	0.0288 (19)	−0.0082 (17)	−0.0047 (16)	−0.0063 (16)
N4	0.0314 (19)	0.0301 (19)	0.037 (2)	−0.0028 (15)	−0.0058 (15)	−0.0059 (16)
C1	0.037 (3)	0.047 (3)	0.045 (3)	−0.005 (2)	−0.005 (2)	−0.005 (2)
C2	0.035 (2)	0.029 (2)	0.031 (2)	−0.0043 (18)	−0.0064 (18)	−0.0024 (18)
C3	0.038 (3)	0.040 (3)	0.033 (2)	−0.004 (2)	−0.0036 (19)	−0.001 (2)
C4	0.038 (3)	0.063 (3)	0.046 (3)	0.001 (2)	−0.004 (2)	−0.001 (3)
C5	0.048 (3)	0.064 (4)	0.051 (3)	0.006 (3)	0.007 (3)	−0.002 (3)
C6	0.070 (4)	0.064 (4)	0.040 (3)	0.001 (3)	0.008 (3)	−0.013 (3)
C7	0.061 (3)	0.051 (3)	0.038 (3)	−0.003 (3)	−0.009 (2)	−0.007 (2)
C8	0.044 (3)	0.033 (2)	0.035 (3)	−0.007 (2)	−0.005 (2)	−0.004 (2)
C17	0.039 (3)	0.056 (3)	0.068 (4)	−0.011 (2)	−0.011 (3)	−0.006 (3)
C18	0.037 (2)	0.037 (2)	0.032 (2)	−0.009 (2)	−0.0052 (19)	−0.0003 (19)
C19	0.038 (2)	0.035 (2)	0.021 (2)	−0.0020 (19)	−0.0034 (17)	−0.0014 (18)
C20	0.047 (3)	0.035 (2)	0.032 (2)	0.001 (2)	0.001 (2)	−0.001 (2)
C21	0.031 (3)	0.059 (3)	0.050 (3)	0.000 (2)	−0.001 (2)	0.012 (3)
C22	0.030 (2)	0.058 (3)	0.044 (3)	−0.015 (2)	−0.007 (2)	0.009 (2)
C23	0.040 (3)	0.037 (3)	0.036 (3)	−0.011 (2)	−0.008 (2)	0.004 (2)
C24	0.027 (2)	0.033 (2)	0.027 (2)	−0.0050 (17)	−0.0050 (17)	0.0017 (18)
C16	0.060 (3)	0.036 (3)	0.035 (3)	−0.010 (2)	−0.010 (2)	−0.004 (2)
C14	0.034 (2)	0.034 (2)	0.034 (2)	−0.0060 (19)	−0.0029 (18)	−0.0029 (19)
C15	0.035 (2)	0.033 (2)	0.039 (3)	−0.0068 (19)	−0.0086 (19)	−0.001 (2)
C10	0.033 (2)	0.041 (3)	0.038 (3)	−0.006 (2)	−0.0105 (19)	−0.008 (2)
C11	0.078 (4)	0.059 (3)	0.029 (3)	−0.024 (3)	−0.009 (2)	−0.002 (2)
C12	0.102 (5)	0.057 (4)	0.037 (3)	−0.041 (3)	−0.005 (3)	0.005 (3)
C13	0.069 (4)	0.043 (3)	0.040 (3)	−0.026 (3)	−0.004 (2)	−0.004 (2)
C9	0.040 (3)	0.040 (3)	0.047 (3)	−0.001 (2)	−0.022 (2)	−0.008 (2)

Geometric parameters (Å, º) top

I1—Cd1	2.7121 (9)	C17—H17A	0.9600
I2—Cd1	2.7325 (10)	C17—H17B	0.9600
Cd1—N1ⁱ	2.275 (3)	C17—H17C	0.9600
Cd1—N4	2.294 (3)	C19—C24	1.392 (6)
N1—C2	1.314 (5)	C19—C20	1.391 (6)
N1—C3	1.389 (5)	C20—C21	1.368 (7)
N1—Cd1ⁱ	2.275 (3)	C20—H20	0.9300
N2—C2	1.367 (5)	C21—C22	1.382 (7)
N2—C8	1.385 (6)	C21—H21	0.9300
N2—C9	1.463 (5)	C22—C23	1.381 (6)
N3—C18	1.353 (6)	C22—H22	0.9300
N3—C19	1.377 (5)	C23—C24	1.389 (6)
N3—C16	1.457 (5)	C23—H23	0.9300
N4—C18	1.324 (5)	C16—C14	1.517 (6)
N4—C24	1.397 (5)	C16—H16A	0.9700
C1—C2	1.479 (6)	C16—H16B	0.9700
C1—H1A	0.9600	C14—C13	1.355 (7)
C1—H1B	0.9600	C14—C15	1.395 (6)
C1—H1C	0.9600	C15—C10	1.378 (6)
C3—C8	1.397 (6)	C15—H15	0.9300
C3—C4	1.391 (6)	C10—C11	1.382 (7)
C4—C5	1.362 (7)	C10—C9	1.503 (6)
C4—H4	0.9300	C11—C12	1.370 (7)
C5—C6	1.394 (8)	C11—H11	0.9300
C5—H5	0.9300	C12—C13	1.388 (7)
C6—C7	1.368 (7)	C12—H12	0.9300
C6—H6	0.9300	C13—H13	0.9300
C7—C8	1.377 (6)	C9—H9A	0.9700
C7—H7	0.9300	C9—H9B	0.9700
C17—C18	1.476 (6)

N1ⁱ—Cd1—N4	95.46 (13)	N4—C18—N3	112.0 (4)
N1ⁱ—Cd1—I1	104.94 (9)	N4—C18—C17	125.0 (4)
N4—Cd1—I1	108.30 (9)	N3—C18—C17	122.9 (4)
N1ⁱ—Cd1—I2	113.68 (9)	C24—C19—N3	105.6 (4)
N4—Cd1—I2	99.05 (9)	C24—C19—C20	122.0 (4)
I1—Cd1—I2	129.68 (3)	N3—C19—C20	132.3 (4)
C2—N1—C3	106.6 (3)	C21—C20—C19	116.7 (4)
C2—N1—Cd1ⁱ	132.2 (3)	C21—C20—H20	121.6
C3—N1—Cd1ⁱ	121.1 (3)	C19—C20—H20	121.6
C2—N2—C8	107.5 (4)	C20—C21—C22	121.9 (4)
C2—N2—C9	128.1 (4)	C20—C21—H21	119.0
C8—N2—C9	124.4 (4)	C22—C21—H21	119.0
C18—N3—C19	107.8 (4)	C21—C22—C23	121.7 (4)
C18—N3—C16	126.0 (4)	C21—C22—H22	119.1
C19—N3—C16	126.2 (4)	C23—C22—H22	119.1
C18—N4—C24	105.5 (3)	C22—C23—C24	117.2 (4)
C18—N4—Cd1	126.5 (3)	C22—C23—H23	121.4
C24—N4—Cd1	128.0 (3)	C24—C23—H23	121.4
C2—C1—H1A	109.5	C19—C24—N4	109.1 (3)
C2—C1—H1B	109.5	C19—C24—C23	120.4 (4)
H1A—C1—H1B	109.5	N4—C24—C23	130.4 (4)
C2—C1—H1C	109.5	N3—C16—C14	114.1 (4)
H1A—C1—H1C	109.5	N3—C16—H16A	108.7
H1B—C1—H1C	109.5	C14—C16—H16A	108.7
N1—C2—N2	111.5 (4)	N3—C16—H16B	108.7
N1—C2—C1	125.4 (4)	C14—C16—H16B	108.7
N2—C2—C1	123.1 (4)	H16A—C16—H16B	107.6
C8—C3—C4	119.8 (4)	C13—C14—C15	118.5 (4)
C8—C3—N1	109.0 (4)	C13—C14—C16	124.1 (4)
C4—C3—N1	131.1 (4)	C15—C14—C16	117.5 (4)
C5—C4—C3	117.4 (5)	C10—C15—C14	121.5 (4)
C5—C4—H4	121.3	C10—C15—H15	119.2
C3—C4—H4	121.3	C14—C15—H15	119.2
C4—C5—C6	122.2 (5)	C15—C10—C11	118.7 (4)
C4—C5—H5	118.9	C15—C10—C9	119.9 (4)
C6—C5—H5	118.9	C11—C10—C9	121.4 (4)
C7—C6—C5	121.2 (5)	C12—C11—C10	120.3 (4)
C7—C6—H6	119.4	C12—C11—H11	119.9
C5—C6—H6	119.4	C10—C11—H11	119.9
C6—C7—C8	116.9 (5)	C11—C12—C13	120.1 (5)
C6—C7—H7	121.5	C11—C12—H12	120.0
C8—C7—H7	121.5	C13—C12—H12	120.0
C7—C8—N2	132.1 (4)	C14—C13—C12	120.9 (5)
C7—C8—C3	122.5 (4)	C14—C13—H13	119.5
N2—C8—C3	105.4 (4)	C12—C13—H13	119.5
C18—C17—H17A	109.5	N2—C9—C10	111.8 (4)
C18—C17—H17B	109.5	N2—C9—H9A	109.2
H17A—C17—H17B	109.5	C10—C9—H9A	109.2
C18—C17—H17C	109.5	N2—C9—H9B	109.2
H17A—C17—H17C	109.5	C10—C9—H9B	109.2
H17B—C17—H17C	109.5	H9A—C9—H9B	107.9

N1ⁱ—Cd1—N4—C18	43.2 (4)	C19—N3—C18—C17	177.2 (4)
I1—Cd1—N4—C18	151.0 (3)	C16—N3—C18—C17	−2.3 (7)
I2—Cd1—N4—C18	−71.8 (4)	C18—N3—C19—C24	0.5 (4)
N1ⁱ—Cd1—N4—C24	−135.6 (3)	C16—N3—C19—C24	180.0 (4)
I1—Cd1—N4—C24	−27.8 (3)	C18—N3—C19—C20	−176.6 (4)
I2—Cd1—N4—C24	109.4 (3)	C16—N3—C19—C20	2.9 (7)
C3—N1—C2—N2	0.4 (5)	C24—C19—C20—C21	−0.3 (6)
Cd1ⁱ—N1—C2—N2	−174.8 (3)	N3—C19—C20—C21	176.5 (4)
C3—N1—C2—C1	−178.8 (4)	C19—C20—C21—C22	−1.0 (7)
Cd1ⁱ—N1—C2—C1	5.9 (7)	C20—C21—C22—C23	1.4 (7)
C8—N2—C2—N1	−0.7 (5)	C21—C22—C23—C24	−0.4 (7)
C9—N2—C2—N1	178.9 (4)	N3—C19—C24—N4	0.2 (4)
C8—N2—C2—C1	178.6 (4)	C20—C19—C24—N4	177.7 (4)
C9—N2—C2—C1	−1.8 (7)	N3—C19—C24—C23	−176.3 (4)
C2—N1—C3—C8	0.0 (5)	C20—C19—C24—C23	1.2 (6)
Cd1ⁱ—N1—C3—C8	175.9 (3)	C18—N4—C24—C19	−0.8 (5)
C2—N1—C3—C4	178.9 (5)	Cd1—N4—C24—C19	178.2 (3)
Cd1ⁱ—N1—C3—C4	−5.2 (7)	C18—N4—C24—C23	175.2 (4)
C8—C3—C4—C5	1.1 (7)	Cd1—N4—C24—C23	−5.8 (6)
N1—C3—C4—C5	−177.7 (5)	C22—C23—C24—C19	−0.8 (6)
C3—C4—C5—C6	−0.9 (8)	C22—C23—C24—N4	−176.4 (4)
C4—C5—C6—C7	0.3 (9)	C18—N3—C16—C14	−74.6 (6)
C5—C6—C7—C8	0.2 (8)	C19—N3—C16—C14	106.1 (5)
C6—C7—C8—N2	178.4 (5)	N3—C16—C14—C13	−4.9 (7)
C6—C7—C8—C3	0.1 (7)	N3—C16—C14—C15	175.5 (4)
C2—N2—C8—C7	−178.0 (5)	C13—C14—C15—C10	−0.4 (7)
C9—N2—C8—C7	2.5 (8)	C16—C14—C15—C10	179.2 (4)
C2—N2—C8—C3	0.6 (5)	C14—C15—C10—C11	0.5 (7)
C9—N2—C8—C3	−179.0 (4)	C14—C15—C10—C9	−178.0 (4)
C4—C3—C8—C7	−0.7 (7)	C15—C10—C11—C12	0.5 (8)
N1—C3—C8—C7	178.4 (4)	C9—C10—C11—C12	179.1 (5)
C4—C3—C8—N2	−179.5 (4)	C10—C11—C12—C13	−1.7 (9)
N1—C3—C8—N2	−0.4 (5)	C15—C14—C13—C12	−0.8 (8)
C24—N4—C18—N3	1.2 (5)	C16—C14—C13—C12	179.6 (5)
Cd1—N4—C18—N3	−177.9 (3)	C11—C12—C13—C14	1.9 (9)
C24—N4—C18—C17	−177.1 (4)	C2—N2—C9—C10	−112.9 (5)
Cd1—N4—C18—C17	3.9 (6)	C8—N2—C9—C10	66.6 (6)
C19—N3—C18—N4	−1.1 (5)	C15—C10—C9—N2	−119.4 (5)
C16—N3—C18—N4	179.4 (4)	C11—C10—C9—N2	62.1 (6)

Symmetry code: (i) −x+1, −y, −z+1.

Experimental details

Crystal data
Chemical formula	[Cd₂I₄(C₂₄H₂₂N₄)₂]
M_r	1465.33
Crystal system, space group	Triclinic, P1
Temperature (K)	293
a, b, c (Å)	9.3968 (19), 11.286 (2), 11.703 (2)
α, β, γ (°)	87.20 (3), 84.60 (3), 86.03 (3)
V (Å³)	1231.5 (4)
Z	1
Radiation type	Mo Kα
µ (mm⁻¹)	3.41
Crystal size (mm)	0.20 × 0.10 × 0.08

Data collection
Diffractometer	Rigaku Saturn 724 CCD diffractometer
Absorption correction	Multi-scan (CrystalClear; Rigaku/MSC, 2006)
T_min, T_max	0.549, 0.772
No. of measured, independent and observed [I > 2σ(I)] reflections	13506, 4836, 4153
R_int	0.028
(sin θ/λ)_max (Å⁻¹)	0.617

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.037, 0.080, 1.05
No. of reflections	4836
No. of parameters	282
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.79, −1.22

Computer programs: CrystalClear (Rigaku/MSC, 2006), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), CrystalStructure (Rigaku/MSC, 2006).

Acknowledgements

HJY thanks Henan University of Urban Construction for research facilities and financial support.

References

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