Structure and conformation of a nickel complex: {2-Hydroxo-3-piperidine-1-yl-methyl-N,N'(bis-5-bromobenzylpropylenediimine)nickel(II)perchlorate} by S. M. Malathy Sony, K. Saraboji, M. N. Ponnuswamy, J. Manonmani, M. Kandasamy, and H-K. Fun

Crystal Research and Technology

Cryst. Res. Technol. 39, 185 (2004) - Abstract -

Structure and conformation of a nickel complex: {2-Hydroxo-3-piperidine-1-yl-methyl-N,N'(bis-5-bromobenzylpropylenediimine)nickel(II)perchlorate}

S. M. Malathy Sony, K. Saraboji, M. N. Ponnuswamy, J. Manonmani*, M. Kandasamy*, and H-K. Fun**

Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, India
*Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, India
**X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia

Keywords	nickel complex, schiff base, piperidine, structure, conformation, C-H…pi interaction, hydrogen bonds
PACS	61.66.Hq
DOI	10.1002/crat.200310169

The title compound, a nickel complex [C₂₃H₂₆N₃O₂Br₂Ni^.(ClO₄)] (CCDC 199520) crystallizes in triclinic space group P-1 with the cell parameters a = 10.2560(4), b = 10.8231(4), c = 12.0888(5)Å, α = 99.404(1), β = 99.780(1), γ = 92.252(1)º and V = 1301.49(9)Å³. The structure was solved by Patterson method and refined by full-matrix least-squares procedures to a final R = 0.0497 using 6287 observed reflections. In the complex, the piperidine ring takes chair conformation and the geometry around the Ni ion is slightly distorted square planar. The dihedral angle between the planes [N-Ni-N and O-Ni-O] is 9.4(1)º. The chelate ring containing both the nitrogen atoms adopts twisted boat conformation. The molecules in the crystal are stabilized by N-H...O and C-H...O types of hydrogen bonds in addition to a C-H...π interaction.

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