Synthesis,structure, and properties of organoplatinum(ii) derivatives of diphenyl ether |
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| Authors: | T V Baukova N A Oleinikova L G Kuz'mina |
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| Institution: | (1) A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28 ul. Vavilova, 117813 Moscow, Russian Federation;(2) N. S Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Science, 31 Leninsky prosp., 117907 Moscow, Russian Federation |
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| Abstract: | New mono- and disubstituted organoplatinum(II) derivatives of diphenyl ether,cis-(PhOC6H4-o)PtCl(PPh3)2 and (o-C6H4OC6H4-o)Pt(PPh3)2, were synthesized by the reaction of 2,2 -dilithium diphenyl oxide withcis-Cl2Pt(PPh3)2. Transmetallation of (PhOC6H4-o)AuPPh3 withcis-Cl2Pt(PPh3)2 was studied using31P NMR monitoring. This reaction proceeds with the retention of configuration to afford ClAuPPh3 andcis-(PhOC6H4-o)PtCl(PPh3)2 under kinetically controlled conditions. The latter complex irreversibly isomerizes into thetrans isomer in the presence of equimolar quantities of ClAuPPh3, whereas, in the presence of free PPh3, this isomerization is reversible. The structures of the obtained diphenyl oxide derivatives of platinum were confirmed by31P NMR and FAB mass spectrometry. It was established by X-ray structural analysis that in thecis-(PhOC6H4-o)PtCl(PPh3)2 complex, the Pt atom is in a nearly square-planar coordination, and secondary intramolecular Pt...O interaction occurs.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1814–1820, October, 1994.We would like to thank A. L. Blyumenfel'd and P. V. Petrovskii for recording the 31p NMR spectra, and D. V. Zagorevskii and K. V. Kazakov for measuring the mass spectrometric characteristics.This work was supported by the International Science Foundation (Project No. MDV 000). |
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| Keywords: | hypercoordination organoplatinum(II) compounds diphenyl ether synthesis X-ray diffraction study isomerization 31P NMR FAB mass spectrometry |
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