Unusual Metal–Metal Bonding in a Dinuclear Pt–Au Complex: Snapshot of a Transmetalation Process |
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| Authors: | Dr Miguel Baya Dr Úrsula Belío Dr Israel Fernández Dr Sara Fuertes Dr Antonio Martín |
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| Institution: | 1. Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, Universidad de Zaragoza—CSIC, Zaragoza, Spain;2. Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid, Spain |
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| Abstract: | The dinuclear Pt–Au complex (CNC)(PPh3)Pt Au(PPh3)](ClO4) ( 2 ) (CNC=2,6‐diphenylpyridinate) was prepared. Its crystal structure shows a rare metal–metal bonding situation, with very short Pt–Au and Au–Cipso(CNC) distances and dissimilar Pt–Cipso(CNC) bonds. Multinuclear NMR spectra of 2 show the persistence of the Pt–Au bond in solution and the occurrence of unusual fluxional behavior involving the PtII] and AuI] metal fragments. The PtII]??? AuI] interaction has been thoroughly studied by means of DFT calculations. The observed bonding situation in 2 can be regarded as a model for an intermediate in a transmetalation process. |
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| Keywords: | DFT calculations donor– acceptor systems fluxionality heterobimetallic complexes metal– metal bonds |
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