SYNTHESES AND SINGLE-CRYSTAL X-RAY STRUCTURES OF A SERIES OF MONOSUBSTITUTED CIS,CIS-1,3,5-TRIAMINOCYCLOHEXANE-BASED COMPLEXES

The four triimine compds. cis,cis-1,3,5-tris[(E)-(X)-benzylideneamino]cyclohexane [X = H (1); 3-hydroxy (2); 3,5-dimethoxy (3); 4-acetamido (4)] were synthesized by the condensation of cis,cis-1,3,5-triaminocyclohexane with a substituted arom. aldehyde. Complexation of these ligands with metal salts (1 with Ni, Cu, and Zn salts; 2 and 3 with Cu salts; 4 with a Zn salt) causes a selective hydrolysis reaction producing new monoimine complexes. The resulting complexes were characterized by a combination of IR spectroscopy, elemental anal., mass spectrometry and, in the cases of the zinc complexes, 1H NMR spectroscopy. The structures of all six complexes are confirmed by single-crystal x-ray crystallog. studies. [on SciFinder(R)]