Bis{μ-1,3-bis-[(2-methyl-1H-benzimid-azol-1-yl)meth-yl]benzene-κN:N}bis-(diiodidocadmium).

In the title compound, [Cd(2)I(4)(C(24)H(22)N(4))(2)], the 1,3-bis-[(2-methyl-1H-benzimidazol-1-yl)meth-yl]benzene ligand bridges two CdI(2) units, forming a centrosymmetric dinuclear complex. The Cd(II) atom adopts a distorted tetra-hedral coordination geometry. In the crystal, complex mol-ecules are linked into columns parallel to [101] by π-π stacking inter-actions, 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 = 1465.33

Triclinic,

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[F 2 > 2σ(F 2)] = 0.037

wR(F 2) = 0.080

S = 1.05

4836 reflections

282 parameters

H-atom parameters constrained

Δρmax = 0.79 e Å−3

Δρmin = −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.

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536811042334/rz2634sup1.cif

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

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

[Cd2I4(C24H22N4)2]	Z = 1
Mr = 1465.33	F(000) = 696
Triclinic, P1	Dx = 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

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

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(Fo2) + (0.0315P)2 + 1.6758P] where P = (Fo2 + 2Fc2)/3
4836 reflections	(Δ/σ)max < 0.001
282 parameters	Δρmax = 0.79 e Å−3
0 restraints	Δρmin = −1.22 e Å−3

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.

	x	y	z	Uiso*/Ueq
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*

	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)

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)