Expedient, Direct Synthesis of (L)Pt(0)(1,6-diene) Complexes from H2PtCl6

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• 作者：Guillaume Berthon-Gelloz ; Jean-Marc Schumers ; Fabio Lucaccioni ; Bernard Tinant ; Johan Wouters ; Istvá ; n E. Mark&oacute
• 刊名：Organometallics
• 出版年：2007
• 出版时间：November 5, 2007
• 年：2007
• 卷：26
• 期：23
• 页码：5731 - 5734
• 全文大小：84K
• 年卷期：v.26,no.23(November 5, 2007)
• ISSN：1520-6041

文摘

The one-pot synthesis of useful [Pt₂(0)(⁴-1,6-diene)₃]complexes, directly from H₂PtCl₆·xH₂O, has remained anunaddressed problem. We have found that the treatment of ani-PrOH solution of H₂PtCl₆·xH₂O by (Me₃SiO)₂MeSi(CH=CH₂),in the presence of allyl ether (AE), followed by reaction of thein situ generated Pt(0) species with IPr carbene (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) enables the isolation of (IPr)Pt(AE) (1) in 50-70% yield. The scope of thismethod has been extended to other (L)Pt(1,6-diene) complexes(L = 1,3-dicyclohexylimidazol-2-ylidene, triphenylphoshine; 1,6-diene = diethyl 2,2-diallylmalonate (DAM)), and the molecularstructure of the (IPr)Pt(DAM) (4) complex has been unequivocally determined by a single-crystal X-ray diffraction analysis.These results are significant for the formation of active L-Pt(0) fragments in catalysis.