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We believe that in our case the nucleophilic attack
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1
No signs of fluxionality are observed either in the H-
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NMR or 31P{1H}-NMR spectra when they are recorded
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carried out. Attempts to detect the proposed intermedi-
ate 9 (see Scheme 2) by NMR were unsuccessful since
the reaction occurs very rapidly on the NMR time scale.
In the same way, efforts to synthesise this compound by
reaction of the ligand o-Ph2P(S)C6H4SMe with the
dimeric complex [{Me2Pt(m-SMe2)}2], have also been
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In conclusion, the synthesis of novel both neutral and
cationic trimethylplatinum(IV) complexes has been
reported, and we have also shown the first example of
an external nucleophilic attack on a well characterized
cationic trimethylplatinum(IV) complex. Studies on
analogous systems to extend the scope of this mode of
reactivity are currently in progress.
Crystal Structures, University of Gottingen, Germany, 1997.
¨
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4. Supplementary material
Crystallographic data for the structural analysis has
been deposited with the Cambridge Crystallographic
Data Centre, CCDC no. 201190 for compound 4.
Copies of this information may be obtained free of
charge from The Director, CCDC, 12 Union Road,
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Sik, T.S. Cameron, J. Chem. Soc. Dalton Trans. (1985) 345.
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Inorg. Chem. 31 (1992) 1479.
[22] R. Contreras, M. Valderrama, C. Beroggi, S. Alegr´ıa, P. Ram´ırez,
unpublished work.
[23] M. Valderrama, R. Contreras, P. Munoz, M.P. Lamata, D.
˜
Cambridge CB2 1 EZ, UK (Fax: ꢃ44-1223-336033;
/
e-mail: deposit @ccdc.can.ac.uk or www: http://
Carmona, F.J. Lahoz, S. Elipe, L.A. Oro, J. Organomet. Chem.
633 (2001) 182.
[24] R. Contreras, M. Valderrama, L. Alegr´ıa, E. Simo´n, Manuscript
in preparation.
Acknowledgements
[25] (a) R. Contreras, M. Valderrama, E.M. Orellana, D. Boys, D.
Carmona, L.A. Oro, M.P. Lamata, J. Ferrer, J. Organomet.
Chem. 606 (2000) 197;
We thank the Fondo de Desarrollo Cient´ıfico y
Tecnolo´gico (FONDECYT), Chile (Grant 8980007)
and Direction of Investigation, Pontificia Universidad
Cato´lica de Chile (DIPUC), (Grant 234/2002) for
financial support. We also thank Dr James Blackwell
for useful comments and for helping with the manu-
script corrections.
(b) K. Kite, A.F. Psaila, J. Organomet. Chem. 441 (1992) 159;
(c) R. Contreras, A. Nettle, Bol. Soc. Chil. Quim. 34 (1989) 173;
(d) R. Contreras, A. Nettle, Bol. Soc. Chil. Quim. 30 (1985) 21.
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(b) N. Duran, P. Gonza´lez-Duarte, A. Lledo´s, T. Parella, J. Sola,
G. Ujaque, W. Clegg, K.A. Fraser, Inorg. Chim. Acta 265 (1997)
89.
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Organomet. Chem. 527 (1997) 125;
(b) R. Contreras, M. Valderrama, O. Riveros, R. Moscoso,
Polyhedron 15 (1996) 183;
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