On the coordination behavior of the hmta toward zinc and cadmium cations in presence of sulfate(VI) and nitrate(V) anions

摘要

Zinc and cadmium sulfate and nitrate complexes with hexamethylenetetramine, [Zn(hmta)_2 (H_2O)_4]~(2+)?[Zn(H_2O)_6]~(2+)-2SO_4~(2-)?6H_2O (1), [Cd(hmta)(H_2O)_4]_n~(2+)SO_4~(2-)H_2O (2), [Zn(H_2O)_6]~(2+)?2 (hmta)?2NO_3~-4H_2O (3) and [Cd(hmta)(NO_3)_2(H_2O)_2]_n (4), have been synthesized and characterized by elemental and thermal analysis, IR spectroscopy, and X-ray crystallography.