metal-organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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ISSN: 2056-9890

Di-μ-chlorido-bis­­[(2,2′-bibenzimidazole)chloridocadmium(II)]

aChifeng University, Chifeng 024000, People's Republic of China
*Correspondence e-mail: liu_ge2008@163.com

(Received 26 November 2008; accepted 4 December 2008; online 10 December 2008)

The title binuclear complex, [Cd2Cl4(C14H10N4)2], was synthesized by the hydro­thermal reaction of CdCl2 and the ligand 2,2′-bibenzimidazole. The mol­ecule lies on an inversion center and the metal center displays a strongly distorted trigonal-bipyramidal geometry. The CdII ions are coordinated by two N atoms from the organic ligand, and by one terminal and two bridging chloride anions. The crystal structure involves inter­molecular N—H⋯Cl hydrogen bonds, resulting in a one-dimensional supra­molecular structure.

Related literature

For the synthesis of 2,2′-bibenzimidazole, see: Fieselmann et al. (1978[Fieselmann, B. F., Hendrickson, D. N. & Stucky, G. D. (1978). Inorg. Chem. 17, 2074-2077.]). For general properties of CdII-based complex polymers, see: Meng et al. (2004[Meng, X. R., Song, Y. L., Hou, H. W., Han, H. Y., Xiao, B., Fan, Y. T. & Zhu, Y. (2004). Inorg. Chem. 43, 3528-3536.]).

[Scheme 1]

Experimental

Crystal data
  • [Cd2Cl4(C14H10N4)2]

  • Mr = 835.12

  • Monoclinic, C 2/c

  • a = 11.824 (2) Å

  • b = 10.784 (2) Å

  • c = 22.828 (5) Å

  • β = 91.10 (3)°

  • V = 2910.1 (10) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 1.86 mm−1

  • T = 293 (2) K

  • 0.17 × 0.16 × 0.12 mm

Data collection
  • Rigaku R-AXIS RAPID-S diffractometer

  • Absorption correction: none

  • 14677 measured reflections

  • 3337 independent reflections

  • 2840 reflections with I > 2σ(I)

  • Rint = 0.035

Refinement
  • R[F2 > 2σ(F2)] = 0.033

  • wR(F2) = 0.060

  • S = 1.14

  • 3337 reflections

  • 190 parameters

  • H-atom parameters constrained

  • Δρmax = 0.29 e Å−3

  • Δρmin = −0.34 e Å−3

Table 1
Selected geometric parameters (Å, °)

Cd1—N4 2.305 (2)
Cd1—N1 2.338 (2)
Cd1—Cl2 2.4602 (8)
Cd1—Cl1 2.5725 (10)
Cd1—Cl1i 2.5903 (10)
N4—Cd1—Cl2 118.63 (6)
N4—Cd1—Cl1 144.04 (6)
Cl2—Cd1—Cl1 96.65 (3)
N1—Cd1—Cl1i 154.49 (6)
Symmetry code: (i) -x+2, -y+2, -z+1.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
N3—H16⋯Cl2ii 0.86 2.39 3.221 (2) 163
Symmetry code: (ii) [x-{\script{1\over 2}}, y-{\script{1\over 2}}, z].

Data collection: RAPID-AUTO (Rigaku, 1998[Rigaku (1998). RAPID-AUTO. Rigaku Corporation, Tokyo, Japan.]); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002[Rigaku/MSC (2002). CrystalStructure. Rigaku/MSC Inc., The Woodlands, Texas, USA.]); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); software used to prepare material for publication: SHELXTL.

Supporting information


Comment top

Bibenzimidazole has the potential to function as a bis-bidentate nitrogen ligand by coordinating to metal ions as a chelate. On the other hand, CdII-containing coordination polymers have attracted much attention as they are able to bond to different donors ligands simultaneously, because of the CdII large radius. Various coordination modes and potential applications in catalysis, fluorescent materials, NLO materials and so on (Meng et al. 2004) have been described. Here we report the crystal structure of the title complex prepared from CdCl2 and bibenzimidazole ligand (see experimental).

As show in Fig. 1, the complex lies on an inversion center, and Cd atoms have strongly distorted trigonal-bipyramidal geometry, being coordinated by two N atoms from the organic ligand, and by one terminal and two bridging Cl- anions. The two Cd centers are bridged by two chloride ions to give a dinuclear cadmium complex. Intermolecular N—H···Cl hydrogen bonds extend the dinuclear complex to a one dimensional chain in the crystal structure (Fig. 2).

Related literature top

For the synthesis of 2,2'-bibenzimidazole, see: Fieselmann et al. (1978). For general properties of CdII-based complex polymers, see: Meng et al. (2004).

Experimental top

A mixture of CdCl2 (0.073 g, 0.40 mmol), bibenzimidazole (0.070 g, 0.30 mmol) and H2O (10 ml) was placed in a Teflon reactor, then heated to 433 K at 10.8 K/h; after maintaining the reaction at 433 K for three days, it was cooled to 303 K at 10.8 K/h. Crystals suitable for X-ray analysis were obtained.

Refinement top

Raw diffraction data were used for refinement, since semi-empirical correction failed to properly correct absorption effects. All H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with N—H = 0.86 Å, C—H = 0.93 Å, and with Uiso(H) = 1.2Ueq(carrier atom).

Computing details top

Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO (Rigaku, 1998); data reduction: CrystalStructure (Rigaku/MSC, 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).

Figures top
[Figure 1] Fig. 1. The structure of the title compound with displacement ellipsoids at the 30% probability level.
[Figure 2] Fig. 2. One dimensional chain formed by hydrogen bonds (dashed lines) in the crystal structure of the title compound.
Di-µ-chlorido-bis[(2,2'-bibenzimidazole)chloridocadmium(II)] top
Crystal data top
[Cd2Cl4(C14H10N4)2]F(000) = 1632
Mr = 835.12Dx = 1.906 Mg m3
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2ycCell parameters from 13595 reflections
a = 11.824 (2) Åθ = 3.1–27.5°
b = 10.784 (2) ŵ = 1.86 mm1
c = 22.828 (5) ÅT = 293 K
β = 91.10 (3)°Prism, yellow
V = 2910.1 (10) Å30.17 × 0.16 × 0.12 mm
Z = 4
Data collection top
Rigaku R-AXIS RAPID-S
diffractometer
2840 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.035
Graphite monochromatorθmax = 27.5°, θmin = 3.1°
ω scansh = 1515
14677 measured reflectionsk = 1414
3337 independent reflectionsl = 2929
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)] = 0.033Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.060H-atom parameters constrained
S = 1.14 w = 1/[σ2(Fo2) + (0.0213P)2 + 2.9529P]
where P = (Fo2 + 2Fc2)/3
3337 reflections(Δ/σ)max = 0.002
190 parametersΔρmax = 0.29 e Å3
0 restraintsΔρmin = 0.34 e Å3
Crystal data top
[Cd2Cl4(C14H10N4)2]V = 2910.1 (10) Å3
Mr = 835.12Z = 4
Monoclinic, C2/cMo Kα radiation
a = 11.824 (2) ŵ = 1.86 mm1
b = 10.784 (2) ÅT = 293 K
c = 22.828 (5) Å0.17 × 0.16 × 0.12 mm
β = 91.10 (3)°
Data collection top
Rigaku R-AXIS RAPID-S
diffractometer
2840 reflections with I > 2σ(I)
14677 measured reflectionsRint = 0.035
3337 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0330 restraints
wR(F2) = 0.060H-atom parameters constrained
S = 1.14Δρmax = 0.29 e Å3
3337 reflectionsΔρmin = 0.34 e Å3
190 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
C10.7642 (2)0.8420 (3)0.65287 (12)0.0352 (6)
C20.8455 (3)0.8628 (3)0.69666 (14)0.0488 (8)
H20.90960.91020.68960.059*
C30.8279 (3)0.8110 (3)0.75062 (15)0.0567 (9)
H30.88040.82520.78070.068*
C40.7338 (3)0.7380 (3)0.76151 (14)0.0569 (9)
H40.72520.70370.79850.068*
C50.6533 (3)0.7156 (3)0.71877 (13)0.0523 (9)
H50.59090.66580.72590.063*
C60.6688 (2)0.7699 (3)0.66449 (12)0.0370 (6)
C70.6614 (2)0.8380 (2)0.57409 (11)0.0314 (6)
C80.6263 (2)0.8657 (2)0.51432 (11)0.0314 (6)
C90.5301 (2)0.8803 (2)0.43105 (11)0.0319 (6)
C100.4514 (2)0.8770 (3)0.38526 (13)0.0409 (7)
H100.38170.83810.38890.049*
C110.4822 (3)0.9342 (3)0.33429 (13)0.0450 (7)
H110.43180.93430.30250.054*
C120.5875 (3)0.9926 (3)0.32871 (13)0.0441 (7)
H120.60501.03020.29340.053*
C130.6652 (2)0.9957 (2)0.37397 (12)0.0378 (6)
H130.73491.03430.37000.045*
C140.6356 (2)0.9386 (2)0.42626 (11)0.0306 (6)
Cd10.851704 (16)1.006362 (18)0.527622 (9)0.03487 (7)
Cl11.04814 (6)0.95042 (8)0.57022 (3)0.04315 (18)
Cl20.84050 (6)1.21444 (7)0.57132 (3)0.04270 (18)
N10.75762 (18)0.8824 (2)0.59515 (10)0.0343 (5)
N20.60522 (19)0.7697 (2)0.61309 (9)0.0386 (6)
H150.54160.73270.60720.046*
N30.52742 (18)0.8349 (2)0.48775 (9)0.0347 (5)
H160.47280.79460.50320.042*
N40.69432 (18)0.9280 (2)0.47931 (9)0.0324 (5)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
C10.0327 (15)0.0355 (15)0.0373 (15)0.0013 (11)0.0013 (12)0.0007 (12)
C20.0377 (17)0.058 (2)0.0510 (19)0.0033 (15)0.0065 (15)0.0030 (16)
C30.051 (2)0.071 (2)0.047 (2)0.0076 (18)0.0105 (16)0.0022 (18)
C40.058 (2)0.077 (3)0.0352 (18)0.0122 (19)0.0038 (16)0.0087 (17)
C50.0448 (19)0.067 (2)0.0455 (19)0.0043 (16)0.0112 (15)0.0063 (16)
C60.0329 (15)0.0432 (17)0.0353 (15)0.0006 (12)0.0052 (12)0.0024 (13)
C70.0283 (14)0.0314 (14)0.0348 (14)0.0073 (11)0.0049 (11)0.0026 (11)
C80.0276 (14)0.0320 (14)0.0348 (14)0.0081 (11)0.0037 (11)0.0045 (11)
C90.0307 (14)0.0312 (14)0.0338 (14)0.0053 (11)0.0019 (11)0.0052 (11)
C100.0329 (15)0.0450 (17)0.0446 (17)0.0079 (13)0.0029 (13)0.0052 (14)
C110.0461 (18)0.0484 (18)0.0400 (17)0.0064 (14)0.0103 (14)0.0030 (14)
C120.0552 (19)0.0410 (17)0.0363 (15)0.0103 (14)0.0022 (14)0.0006 (13)
C130.0383 (15)0.0364 (15)0.0389 (15)0.0119 (12)0.0071 (12)0.0028 (13)
C140.0302 (14)0.0282 (13)0.0337 (14)0.0057 (11)0.0044 (11)0.0067 (11)
Cd10.02621 (11)0.03603 (12)0.04251 (12)0.01089 (8)0.00477 (8)0.00660 (10)
Cl10.0287 (3)0.0578 (4)0.0431 (4)0.0050 (3)0.0039 (3)0.0038 (3)
Cl20.0364 (4)0.0389 (4)0.0533 (4)0.0110 (3)0.0141 (3)0.0121 (3)
N10.0256 (11)0.0377 (13)0.0396 (13)0.0070 (9)0.0014 (10)0.0005 (10)
N20.0336 (13)0.0449 (14)0.0375 (13)0.0157 (11)0.0039 (10)0.0001 (11)
N30.0265 (12)0.0396 (13)0.0380 (13)0.0141 (10)0.0039 (10)0.0025 (10)
N40.0288 (12)0.0355 (13)0.0330 (12)0.0111 (10)0.0039 (9)0.0015 (10)
Geometric parameters (Å, º) top
C1—N11.389 (3)C9—C141.403 (3)
C1—C21.393 (4)C10—C111.373 (4)
C1—C61.399 (4)C10—H100.9300
C2—C31.372 (4)C11—C121.403 (4)
C2—H20.9300C11—H110.9300
C3—C41.389 (5)C12—C131.370 (4)
C3—H30.9300C12—H120.9300
C4—C51.371 (4)C13—C141.393 (4)
C4—H40.9300C13—H130.9300
C5—C61.386 (4)C14—N41.389 (3)
C5—H50.9300Cd1—N42.305 (2)
C6—N21.381 (3)Cd1—N12.338 (2)
C7—N11.317 (3)Cd1—Cl22.4602 (8)
C7—N21.341 (3)Cd1—Cl12.5725 (10)
C7—C81.450 (4)Cd1—Cl1i2.5903 (10)
C8—N41.327 (3)Cl1—Cd1i2.5903 (10)
C8—N31.348 (3)N2—H150.8600
C9—N31.385 (3)N3—H160.8600
C9—C101.387 (4)
N1—C1—C2131.0 (3)C13—C12—C11121.7 (3)
N1—C1—C6108.9 (2)C13—C12—H12119.1
C2—C1—C6120.1 (3)C11—C12—H12119.1
C3—C2—C1117.6 (3)C12—C13—C14117.4 (3)
C3—C2—H2121.2C12—C13—H13121.3
C1—C2—H2121.2C14—C13—H13121.3
C2—C3—C4121.8 (3)N4—C14—C13130.9 (2)
C2—C3—H3119.1N4—C14—C9109.0 (2)
C4—C3—H3119.1C13—C14—C9120.2 (3)
C5—C4—C3121.3 (3)N4—Cd1—N173.49 (8)
C5—C4—H4119.3N4—Cd1—Cl2118.63 (6)
C3—C4—H4119.3N1—Cd1—Cl2102.95 (6)
C4—C5—C6117.4 (3)N4—Cd1—Cl1144.04 (6)
C4—C5—H5121.3N1—Cd1—Cl193.11 (6)
C6—C5—H5121.3Cl2—Cd1—Cl196.65 (3)
N2—C6—C5132.8 (3)N4—Cd1—Cl1i91.81 (6)
N2—C6—C1105.5 (2)N1—Cd1—Cl1i154.49 (6)
C5—C6—C1121.7 (3)Cl2—Cd1—Cl1i102.39 (3)
N1—C7—N2113.1 (2)Cl1—Cd1—Cl1i86.78 (3)
N1—C7—C8119.9 (2)Cd1—Cl1—Cd1i93.22 (3)
N2—C7—C8127.0 (2)C7—N1—C1105.3 (2)
N4—C8—N3112.6 (2)C7—N1—Cd1112.71 (17)
N4—C8—C7120.4 (2)C1—N1—Cd1141.87 (18)
N3—C8—C7127.1 (2)C7—N2—C6107.1 (2)
N3—C9—C10131.9 (2)C7—N2—H15126.4
N3—C9—C14105.5 (2)C6—N2—H15126.4
C10—C9—C14122.5 (3)C8—N3—C9107.4 (2)
C11—C10—C9116.2 (3)C8—N3—H16126.3
C11—C10—H10121.9C9—N3—H16126.3
C9—C10—H10121.9C8—N4—C14105.6 (2)
C10—C11—C12122.0 (3)C8—N4—Cd1112.97 (16)
C10—C11—H11119.0C14—N4—Cd1140.52 (16)
C12—C11—H11119.0
N1—C1—C2—C3179.2 (3)C6—C1—N1—C71.1 (3)
C6—C1—C2—C30.3 (5)C2—C1—N1—Cd12.8 (5)
C1—C2—C3—C41.3 (5)C6—C1—N1—Cd1176.7 (2)
C2—C3—C4—C50.8 (5)N4—Cd1—N1—C74.14 (18)
C3—C4—C5—C60.8 (5)Cl2—Cd1—N1—C7112.26 (18)
C4—C5—C6—N2178.4 (3)Cl1—Cd1—N1—C7150.18 (18)
C4—C5—C6—C11.9 (5)Cl1i—Cd1—N1—C761.1 (2)
N1—C1—C6—N20.7 (3)N4—Cd1—N1—C1179.5 (3)
C2—C1—C6—N2178.8 (3)Cl2—Cd1—N1—C163.1 (3)
N1—C1—C6—C5179.1 (3)Cl1—Cd1—N1—C134.5 (3)
C2—C1—C6—C51.3 (4)Cl1i—Cd1—N1—C1123.5 (3)
N1—C7—C8—N45.0 (4)N1—C7—N2—C60.7 (3)
N2—C7—C8—N4175.5 (3)C8—C7—N2—C6178.9 (3)
N1—C7—C8—N3175.0 (3)C5—C6—N2—C7179.7 (3)
N2—C7—C8—N34.6 (5)C1—C6—N2—C70.0 (3)
N3—C9—C10—C11178.9 (3)N4—C8—N3—C90.1 (3)
C14—C9—C10—C110.0 (4)C7—C8—N3—C9179.8 (3)
C9—C10—C11—C120.1 (5)C10—C9—N3—C8178.9 (3)
C10—C11—C12—C130.1 (5)C14—C9—N3—C80.1 (3)
C11—C12—C13—C140.2 (4)N3—C8—N4—C140.1 (3)
C12—C13—C14—N4178.9 (3)C7—C8—N4—C14179.9 (2)
C12—C13—C14—C90.4 (4)N3—C8—N4—Cd1171.44 (17)
N3—C9—C14—N40.0 (3)C7—C8—N4—Cd18.5 (3)
C10—C9—C14—N4179.1 (2)C13—C14—N4—C8179.3 (3)
N3—C9—C14—C13179.5 (2)C9—C14—N4—C80.0 (3)
C10—C9—C14—C130.3 (4)C13—C14—N4—Cd111.9 (5)
N4—Cd1—Cl1—Cd1i88.65 (9)C9—C14—N4—Cd1167.4 (2)
N1—Cd1—Cl1—Cd1i154.46 (6)N1—Cd1—N4—C86.56 (18)
Cl2—Cd1—Cl1—Cd1i102.11 (3)Cl2—Cd1—N4—C889.44 (19)
Cl1i—Cd1—Cl1—Cd1i0.0Cl1—Cd1—N4—C878.4 (2)
N2—C7—N1—C11.1 (3)Cl1i—Cd1—N4—C8165.38 (18)
C8—C7—N1—C1178.5 (2)N1—Cd1—N4—C14173.4 (3)
N2—C7—N1—Cd1178.16 (18)Cl2—Cd1—N4—C1477.4 (3)
C8—C7—N1—Cd11.4 (3)Cl1—Cd1—N4—C14114.8 (3)
C2—C1—N1—C7178.4 (3)Cl1i—Cd1—N4—C1427.8 (3)
Symmetry code: (i) x+2, y+2, z+1.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N3—H16···Cl2ii0.862.393.221 (2)163
Symmetry code: (ii) x1/2, y1/2, z.

Experimental details

Crystal data
Chemical formula[Cd2Cl4(C14H10N4)2]
Mr835.12
Crystal system, space groupMonoclinic, C2/c
Temperature (K)293
a, b, c (Å)11.824 (2), 10.784 (2), 22.828 (5)
β (°) 91.10 (3)
V3)2910.1 (10)
Z4
Radiation typeMo Kα
µ (mm1)1.86
Crystal size (mm)0.17 × 0.16 × 0.12
Data collection
DiffractometerRigaku R-AXIS RAPID-S
diffractometer
Absorption correction
No. of measured, independent and
observed [I > 2σ(I)] reflections
14677, 3337, 2840
Rint0.035
(sin θ/λ)max1)0.649
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.033, 0.060, 1.14
No. of reflections3337
No. of parameters190
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.29, 0.34

Computer programs: RAPID-AUTO (Rigaku, 1998), CrystalStructure (Rigaku/MSC, 2002), SHELXS97 (Sheldrick,2008), SHELXL97 (Sheldrick,2008), SHELXTL (Sheldrick,2008).

Selected geometric parameters (Å, º) top
Cd1—N42.305 (2)Cd1—Cl12.5725 (10)
Cd1—N12.338 (2)Cd1—Cl1i2.5903 (10)
Cd1—Cl22.4602 (8)
N4—Cd1—Cl2118.63 (6)Cl2—Cd1—Cl196.65 (3)
N4—Cd1—Cl1144.04 (6)N1—Cd1—Cl1i154.49 (6)
Symmetry code: (i) x+2, y+2, z+1.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N3—H16···Cl2ii0.862.393.221 (2)163.0
Symmetry code: (ii) x1/2, y1/2, z.
 

Acknowledgements

The author thanks Chifeng University for supporting this work.

References

First citationFieselmann, B. F., Hendrickson, D. N. & Stucky, G. D. (1978). Inorg. Chem. 17, 2074–2077.  CSD CrossRef Web of Science Google Scholar
First citationMeng, X. R., Song, Y. L., Hou, H. W., Han, H. Y., Xiao, B., Fan, Y. T. & Zhu, Y. (2004). Inorg. Chem. 43, 3528–3536.  Web of Science CSD CrossRef PubMed CAS Google Scholar
First citationRigaku (1998). RAPID-AUTO. Rigaku Corporation, Tokyo, Japan.  Google Scholar
First citationRigaku/MSC (2002). CrystalStructure. Rigaku/MSC Inc., The Woodlands, Texas, USA.  Google Scholar
First citationSheldrick, G. M. (2008). Acta Cryst. A64, 112–122.  Web of Science CrossRef CAS IUCr Journals Google Scholar

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