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Organoplatinum compounds VII

1998; Elsevier BV; Volume: 559; Issue: 1-2 Linguagem: Inglês

10.1016/s0022-328x(98)00481-1

1872-8561

H. Donath, Evgeni V. Avtomonov, I. Sarraje, Kristian Dahlén, Mohy El‐Essawi, Jörg Lorberth, B.-S. Seo,

Chemistry and Stereochemistry Studies

The structural chemistry of organoplatinum clusters [Me3PtX]4 (X=halide) has been completed with the synthesis and X-ray investigation of [Me3PtF]4 (1) and its structural comparison to the well-known hydroxide [Me3PtOH]4 (2), all members of the ‘organoplatinum cubane’ family. Compound 1, long withstanding its attempted synthesis, has been obtained by the reaction of [Me3PtI]4 with XeF2 as a mild fluorinating agent in form of colourless crystals: space group I43m, Z=2, a=10.0878(7) Å, R1=0.0242, wR2=0.0563. In order to discriminate 1 from its possible hydrolysis product, viz. [Me3PtOH]4 (2), the latter was also synthesised according to literature procedures and re-investigated by X-ray crystallography: colourless crystals, space group I43m, Z=2, a=10.1400(10) Å, R1=0.0238, wR2=0.0586. NMR spectroscopic, mass spectrometric and, in part, IR data are reported for 1 and 2. A crystalline solid obtained from equimolar chloroform solutions of both 1 and 2 did not reveal any new structural features, e.g. lattice parameters. From this mixture one might have expected a possible formation of strong hydrogen bonds of the type Me3Pt–F···H–O–PtMe3.