SYNTHESIS AND CHARACTERIZATION OF N-BENZOYL-DL-ALPHA-VALINATO COMPLEXES OF PALLADIUM(II), PLATINUM(II) - CRYSTAL-STRUCTURE OF A COMPLEX WITH DEPROTONATED NITROGEN COORDINATING TO THE PALLADIUM(II)

Reactions of MLCl2(M = Pd(II), Pt(II); L = bipy, phen) with Bzval H-2( Bzval H-2 = N-benzoyl-DL-alpha-valine) in aqueous solution at pH simil ar to 9 gave three complexes [Pd(bipy)(Bzval-N,O)] (1), [Pd(phen)(Bzva l-N, O)]. H2O(2) and [Pt(bipy)(Bzval-N,O)]. H2O(3). All of these compl exes were characterized by elemental analysis and IR spectra. The stru cture of 1 has been determined by X-ray diffraction analysis. In all c omplexes an N-benzoyl-DL-alpha-valinate dianion coordinates to the met al ion through a deprotonated amide nitrogen and a carboxylic oxygen. There is some intramolecular interaction between phenyl ring and bipy in the complex. (C) 1997 Elsevier Science Ltd.