{4,4′,6,6′-Tetra­bromo-2,2′-[2,2-dimethyl­propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenolato}nickel(II)

Kargar, H.; Kia, R.; Tahir, M.N.

doi:10.1107/S1600536812020375

Volume 68
Part 6
Page m753
June 2012

Received 29 April 2012
Accepted 6 May 2012
Online 12 May 2012

Key indicators
Single-crystal X-ray study
T = 296 K
Mean (C-C) = 0.005 Å
R = 0.033
wR = 0.075
Data-to-parameter ratio = 16.2
Details

{4,4',6,6'-Tetrabromo-2,2'-[2,2-dimethylpropane-1,3-diylbis(nitrilomethanylylidene)]diphenolato}nickel(II)

Hadi Kargar,^a ^* Reza Kia ^b ⁺ and Muhammad Nawaz Tahir ^c ^*

^aDepartment of Chemistry, Payame Noor University, PO Box 19395-3697 Tehran, I. R. of IRAN,^bDepartment of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran, and ^cDepartment of Physics, University of Sargodha, Punjab, Pakistan
Correspondence e-mail: h.kargar@pnu.ac.ir, dmntahir_uos@yahoo.com

The asymmetric unit of the title compound, [Ni(C₁₉H₁₆Br₄N₂O₂)], comprises half of a Schiff base complex. The geometry around the Ni^II atom, located on a twofold rotation axis, is distorted square-planar, which is supported by the N₂O₂ donor atoms of the coordinated ligand. The dihedral angle between the substituted benzene rings is 23.19 (17)°. In the crystal, a short intermolecular BrBr [3.6475 (7) Å] interaction is present.

Related literature

For applications of Schiff bases in coordination chemistry, see: Granovski et al. (1993); Blower (1998). For related structures, see: Ghaemi et al. (2011); Kargar et al. (2012). For van der Waals radii, see: Bondi (1964). For standard values of bond lengths, see: Allen et al. (1987).

Experimental

Crystal data

[Ni(C₁₉H₁₆Br₄N₂O₂)]
M_r = 682.69
Orthorhombic, P b c n
a = 16.1125 (11) Å
b = 15.4789 (12) Å
c = 8.4734 (5) Å
V = 2113.3 (3) Å³
Z = 4
Mo K radiation
= 8.50 mm^-1
T = 296 K
0.25 × 0.18 × 0.09 mm

Data collection

Bruker SMART APEXII CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2005) T_min = 0.694, T_max = 0.871
16236 measured reflections
2086 independent reflections
1574 reflections with I > 2(I)
R_int = 0.049

Refinement

R[F² > 2(F²)] = 0.033
wR(F²) = 0.075
S = 1.05
2086 reflections
129 parameters
H-atom parameters constrained
_max = 0.52 e Å^-3
_min = -0.78 e Å^-3

Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; 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 and PLATON (Spek, 2009).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SU2421 ).

Acknowledgements

HK thanks PNU for financial support. MNT thanks GC University of Sargodha, Pakistan for the research facility.

References

Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1-19.
Blower, P. J. (1998). Transition Met. Chem., 23, 109-112.
Bondi, A. (1964). J. Phys. Chem. 68, 441-452.
Bruker (2005). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Ghaemi, A., Rayati, S., Elahi, E., Ng, S. W. & Tiekink, E. R. T. (2011). Acta Cryst. E67, m1445-m1446.
Granovski, A. D., Nivorozhkin, A. L. & Minkin, V. I. (1993). Coord. Chem. Rev. 126, 1-69.
Kargar, H., Kia, R., Sharafi, Z. & Tahir, M. N. (2012). Acta Cryst. E68, m82.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.

metal-organic compounds