Helical group 12 co-ordination. The X-ray crystal structure of a five-co-ordinate zinc(II) complex

Abstract

The templated dimine-containing complexes, [M(SpyNpy2)](ClO4)2·0.5H2O {where M = ZnII, CdII or HgII}, exhibit chirality in solution (NMR) which is consistent with, and may be diagnostic of, a helical coordination array in these complexes as verified by the X-ray crystal structure of an enantiomer of the zinc(II) derivative. © 1995.