Some cyclic tetra-amines and their metal-ion complexes. Part VIII. Complexes of rhodium(III) with C-rac- and C-meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane

Abstract

The preparations of complexes of rhodium(III) with the cyclic tetra-amines C-rac- and C-meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane are reported. For both isomers, trans-diacido-derivatives were prepared. For the C-rac-isomer a series of derivatives with the amine in folded (a,b,c,d) co-ordination, with a chelate or cis-unidentate ligands in the two additional co-ordination sites, was also prepared. Configurational isomerism of the complexes arising from the four chiral nitrogen centres present is reported.