Synthesis and electronic, magnetic and E.s.r. studies of some bimetallic alkoxides of copper(II) with niobium(V) and tantalum(V)

Dubey, Raj K. ; Singh, Anirudh ; Mehrotra, Ram C. (1985) Synthesis and electronic, magnetic and E.s.r. studies of some bimetallic alkoxides of copper(II) with niobium(V) and tantalum(V) Transition Metal Chemistry, 10 (12). pp. 473-476. ISSN 0340-4285

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Official URL: http://www.springerlink.com/content/r54jq1u8u68v24...

Related URL: http://dx.doi.org/10.1007/BF00620713

Abstract

Novel bimetallic alkoxides of copper(II) of the type Cu[M(OPr-i)6]2 (M = Nb or Ta) have been synthesised by the interaction of CuCl2 (1 mol) with K[M(OPr-i)6] (2 mol). These bimetallic isopropoxides undergo facile alcohol interchange with primary alcohols such as MeOH, EtOH, n-PrOH and n-BuOH. However, with t-BuOH, the reaction cannot be driven to completion even under prolonged continuous azeotropic fractionation of the liberated i-PrOH and the final product corresponded in analysis to Cu[Ta(OPr-i)2(OBu-t)4]2.I.r., electronic and electron spin resonance spectral and magnetic susceptibility measurements indicate a distorted octahedralD 4h geometry for copper(II) in these bimetallic alkoxides.

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