Synthesis and spectroscopic properties of N-acetyl-DL-phenyl-glycinato complexes of cobalt(II), nickel(II) and copper(II). Crystal structures of bis(N-acetyl-DL-phenyl-glycinato)diaquobis-(N-methylimidazole)cobalt(II), bis(N-acetyl-DL-phenylglycinato)diaquobis (imidazole)cobalt(II) and nickel(II)

• Published in: Polyhedron Vol. 15; no. 11; pp. 1783 - 1791
• Main Authors: Abdel-Rahman, Laila H., Battaglia, Luigi P., Cauzzi, Daniele, Sgarabotto, Paolo, Mahmoud, Mohamed R.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-06-1996
• ISSN: 0277-5387
• DOI: 10.1016/0277-5387(95)00437-8

A series of complexes of N-acetyl-DL-phenylglycine and Co
II, Ni
II and Cu
II containing heterocyclic bases as imidazoles, phen, bipy and terpy were prepared and characterized by conventional methods, IR spectra and, for [Co(OH
2)
2(mimi)
2(Ac-phgly)
2] (
1), [Co(OH
2)
2(imi)
2(Ac-phgly)
2] (
2) and [Ni(OH
2)
2(imi)
2(Ac-phgly)
2 (
3), by X-ray crystal structure. The structure of these complexes consists of discrete [M(OH
2)
2(mimi/imi)
2(Acphyly)
2] units in which the metal shows nearly ideal centrosymmetrical
trans-octahedral geometry bonding two imidazole nitrogens, two carboxylic oxygens and two water molecules. In all cases the amino acid behaves as monodentate via carboxylic oxygen, the second carboxylic oxygen; the NH and CO peptide groups are involved in hydrogen bonds which are responsible for the packing in the crystal.