Transition Metal Chemistry

, Volume 32, Issue 6, pp 746–752 | Cite as

Insertion of ethyl diazoacetate into the platinum–carbon bond of Pt(diphosphine)(halide)(aryl) complexes. X-ray structure of the Pt{(2S,4S)-bdpp)}I(Ph) complex

  • László Jánosi
  • László Kollár
  • Piero Macchi
  • Angelo Sironi
Article

Abstract

Pt(diphosphine)X(aryl) complexes [diphosphine = 1,3-bis(diphenylphosphino)propane (dppp), 2,4-bis(diphenylphos phino)pentane (bdpp); aryl = phenyl, 2-thiophenyl; X = Cl, I] have been reacted with ethyl diazoacetate in chloroform. It has been revealed by in␣situ n.m.r. studies that the starting compounds insert the carbene, formed from ethyl diazoacetate, into the Pt–aryl group resulting in Pt(diphosphine)X{CH(aryl)COOC2H5}. Depending on the reaction conditions (reaction time, ratio of the reactants) and the ligands various side-reactions have been observed: (i) the formation of Pt(diphosphine)X2 in chloroform, (ii) the insertion of the :CHCOOC2H5 fragment into the Pt–halide bond of the dihalogeno complexes Pt(diphosphine)X2 resulting in the exclusive formation of Pt(diphosphine)X(CHXCOOC2H5). Diastereoselective insertion reactions have been observed in the presence of (S,S)-bdpp as diphosphine. The Pt{(S,S)-bdpp)}I(Ph) complex has been characterized by X-ray crystallography.

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Copyright information

© Springer 2007

Authors and Affiliations

  • László Jánosi
    • 1
  • László Kollár
    • 1
  • Piero Macchi
    • 2
  • Angelo Sironi
    • 2
  1. 1.Department of Inorganic ChemistryUniversity of PécsPécsHungary
  2. 2.Dipartimento di Chimica Strutturale e Stereochimica Inorganica dell’ Università di MilanoMilanoItaly

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