Alkoxy Boron-Bridged 14-Membered Macrocyclic Compounds of Nickel(II) with 1,1,8,8-Tetraalkoxy-1,8-dibora-4,5,11,12-tetrafuryl- 3,6,10,13-tetraaza-2,7,9,14-tetraoxacyclotetradeca-3,5,10,12-tetraene

Abstract

A series of 14-membered alkoxyboron-bridged macrocyclic complexes of nickel(II) of the type NiL where L = 1,1,8,8-tetraalkoxy-1,8-diboro- 4,5,11,12-tetrafuryl-3,6,10,13-tetraaza-2,7,9,14- tetraoxacyclotetradecacyclo- 3,5,10,12-tetraene have been prepared by adopting an in situ procedure using nickel(II) chloride, 1,2-difuryl ethane-1,2- dionedioxime and boric acid. The alkoxy groups have been derived from the solvent molecules. All the complexes are spin paired, crystalline and intense coloured solids. Infrared and electronic spectra show that they are isostructural and possess a nearly square planar configuration.