Synthesis and X-ray crystal structure of trans-dichloro( 1-cyano-2,2-dimethylpropane)(1-imino-1-hydroxy-2,2-dimethylpropane)platinum(II)

Nitrile complexes of platinum easily hydrolyze to amidate, amide, and mixed amide-nitrile complexes. The amide ligands generally adopt the enol tautomeric form and coordinate to platinum through nitrogen. A mixed amide-nitrile complex, trans-[PtCl2{HN=C(OH)C(CH3)(3)}{N=CC(CH3)(3)}] (trans-3), has shown to be the complex previously formulated as a platinum(IV) dichlorobisamidate derivative having the two amidate ligands in different tautomeric forms. The structure of trans-3 has been solved by single-crystal diffraction. The complex crystallizes in the Pbcn space group. The crystal structure has strong similarities with that previously reported by some of us for trans-[PtCl2{HN=C(OH)C(CH3)(3)}(2)] [R. Cini, F.P. Fanizzi, F.P. Intini, C, Pacifico, G, Natile, Inorg. Chim. Acta 264 (1997) 279]. Triplets of complex molecules are stabilized by intra-molecular hydrogen bonds involving N, Cl and O atoms. (C) 1999 Elsevier Science Ltd. All rights reserved.