Synthesis and magnetic properties of a 1-D helical chain derived from a Nickel-Sodium Schiff base complex

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Synthesis and magnetic properties of a 1-D helical chain derived from a Nickel-Sodium Schiff base complex

Author : Dr Chinmoy Das

Year : 2014

Publisher : Springer Indiasanjiv.goswami@springer.co.in

Source Title : Journal of Chemical Sciences

Document Type :

Abstract

The reaction of the deprotonated form of the Schiff base ligand; (E)-2-methoxy-6-((phenylimino) methyl)phenol (L) with nickel chloride hydrate results in the formation of the 1-dimentional coordination polymer; Na[Ni(L)2(OMe)(MeOH)]n (1). The structure was determined via single crystal X-ray diffraction measurements. A careful analysis of the complex shows that the polymer exists as a helical structure, where the helicity is brought about by the presence of an alkali metal ion which is observed for the first time. Moreover the helical structure in 1 is maintained predominantly through covalent bond rather than supramolecular interactions. Direct current magnetic susceptibility measurement suggests that complex 1 obeys the Curie law. The fitting of magnetic data using the PHI software package yields parameters of S = 1, g = 2.26 and D = +4.51 (or D = -7.24 cm-1) for 1.