COMPLEXES OF NEW AMINE-NITROGEN SUBSTITUTED ALPHA-AMINE OXIME LIGANDS(P-AMINOBENZYL, P-NITROBENZYL AND P-(AMINOMETHYL)PHENYL SUBSTITUENTS)- X-RAY STRUCTURES OF P-AMINOBENZYLAMINE OXIME DIHYDROCHLORIDE, [NI(AMINOBENZAO)2]CLO4 AND [RH(NITROBENZAO)2CL2]

The syntheses and characterizations of two new amine oxime ligands are described. In addition, the crystal structure of the dihydrochloride salt of the previously reported 2-[N-(4-aminobenzyl)]amino-3-methyl-2- butanone oxime (aminobenzAO) is reported. This structure features a th ree-dimensional network of hydrogen bonds involving the amine and oxim e groups, the chloride ions and the water molecule of crystallization. The crystal structure of the nickel(II) complex of this ligand, [Ni(a minobenzAO)2]ClO4, is reported. This structure features near square pl anar bonding of the two oxime nitrogen atoms and the two aliphatic ami ne nitrogen atoms to the nickel(II) atom with dangling aromatic amine groups. A strong intramolecular O---O hydrogen bond links the two cis oxime groups. Because of crystallization difficulty only a qualitative crystal structure of the rhodium(III) complex of the corresponding 4- nitrobenzyl ligand [Rh(nitrobenzAO)2 Cl2] is included. The octahedral structure is analogous to previously reported complexes with cis oxime nitrogen atoms, ci.5 amine nitrogen atoms and trans chloride ligands.