T. Adatia et al., HELICAL GROUP-12 COORDINATION - THE X-RAY CRYSTAL-STRUCTURE OF A 5-CO-ORDINATE ZINC(II) COMPLEX, Polyhedron, 14(2), 1995, pp. 335-338
The templated diimine-containing complexes, [M(SpyNpy(2))](ClO4)(2).0.
5H(2)O {where M = Zn-II, Cd-II or Hg-II}, exhibit chirality in solutio
n (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.