The colour isomerism and structure of copper co-ordination compounds. Part XI. The crystal structure of bis-(N-t-butylsalicylaldiminato)-copper(II)

Abstract

A three-dimensional X-ray structure analysis of bis-(N-t-butylsalicylaldiminato)copper(II) has revealed a distorted molecular configuration. The copper atom is 4-covalent with the two chelate groups orientated to give a flattened tetrahedral co-ordination geometry. The Cu–O bonds are 1·893 and 1·903 Å in length and the Cu–N bonds 1·960 and 2·010 Å. The angles at the copper are 93·3, 95·3, 96·1, 100·1, 137·4, and 145·3°, and the angle between the mean planes of the two salicylaldiminato-residues is 61·9°. One of these groups is essentially planar but the other is somewhat distorted.