Unusual Metal-Metal Bonding in a Dinuclear Pt-Au Complex: Snapshot of a Transmetalation Process.
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 [Pt(II) ] and [Au(I) ] metal fragments. The [Pt(II) ]⋅⋅⋅ [Au(I) ] 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.
Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, Universidad de Zaragoza-CSIC, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain.
Miguel
0000-0002-2492-625X
M
Baya
Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, Universidad de Zaragoza-CSIC, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain.
Úrsula
Ú
Belío
Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain.
Israel
0000-0002-0186-9774
I
Fernández
Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, Universidad de Zaragoza-CSIC, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain.
Sara
0000-0003-1812-3175
S
Fuertes
Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, Universidad de Zaragoza-CSIC, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain. tello@unizar.es.
Antonio
0000-0002-4808-574X
A
Martín
DFT calculations; donor-acceptor systems; fluxionality; heterobimetallic complexes; metal-metal bonds