Preparation and spectroscopic examination of new mixed-ligand 1,10-phenantroline, phenylhydrazine and benzidine complexes of Co(II), Ni(II), Cu(II) and Zn(II) saccharinates

A series of new mixed-ligand saccharin complexes of Co, Ni, Cu and Zn with 1,10-phenantroline, phenylhydrazine and benzidine have been prepared and ch aracterized by elemental analysis magnetic moments, spectral and thermal an alysis techniques. 1,10-Phenantroline and phenylhydrazine are coordinated t o the metal ions as chelating ligands through their two N atoms, while benz idine acts a monodentate ligand. The metal ions usually have octahedral geo metry with two saccharinate anions in the trans positions and the coordinat ing ligand in the cis positions. The complexes of Cu(II) saccharinates with phenylhydrazine and benzidine exhibit bimetallic dimeric structures with C u-Cu bonds.