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Coordination of a mesogenic Schiff-base with Mn-II, Co-II, Ni-II, Cu-II and Zn-II: Synthesis, spectral studies and crystal structures

Singh, Angad Kumar and Kumari, Sanyucta and Row, TN Guru and Prakash, Jai and Kumar, K Ravi and Sridhar, B and Rao, TR (2008) Coordination of a mesogenic Schiff-base with Mn-II, Co-II, Ni-II, Cu-II and Zn-II: Synthesis, spectral studies and crystal structures. In: Polyhedron, 27 (18). pp. 3710-3716.

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Abstract

A novel mesogenic (nematic) Schiff-base, N,N′-di-4-(4′-pentyloxybenzoate)salicylidene diaminoethane, H2dpbsde (abbreviated as H2L5) was synthesized and its structure studied. The Schiff-base crystallizes in the non-centrosymmetric space group Pna21 with Z = 4, and the mesogenic isomorphous nickel and copper complexes, [NiL5]2 and [CuL5], in the centrosymmetric space group P21/c with Z = 4. The (L5)2− species coordinates to the metal ions through two phenolate oxygens and two azomethine nitrogens. Both the [NiL5]2 and [CuL5] complexes involve cis-MN2O2 planes; the former complex has a low-spin distorted square-pyramidal geometry with a Ni–Ni bonding of 3.337 Å and the latter, a square-planar geometry.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Mesogenic Schiff-base;Low-spin distorted square-pyramidal Ni-II complex;Crystal structures;Square-planar complexes of Co-II and Cu-II.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 17 Aug 2009 09:21
Last Modified: 19 Sep 2010 05:00
URI: http://eprints.iisc.ernet.in/id/eprint/18121

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