Abstract
Mixed complexes of the type trans-[Pt(proO)A] are described (pro =L-prolinate; A = the anion of sarcosine or of the L enantiomers of alanine, serine, valine, or proline). The amino-acidate ligands are mutually trans and are bound to the platinum ion through oxygen and nitrogen. The complexes have been characterized by chemical studies, analyses, and spectra (electronic, c.d., o.r.d., 1H n.m.r., and i.r.). The complex trans-[Pt(proO)(sarO)] has been separated into its diastereoisomeric forms, i.e. trans-[Pt(S-proO)(S-sarO)] and trans-[Pt(S-proO)(R-sarO)], where S and R denote the configurations at the asymmetric nitrogen centres. The rates of inversion (kinv.) and of deuteriation (kD) at the asymmetric nitrogen centres of sarcosine have been compared, and kDkinv.
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