Oxidatively induced reductive coupling of PPh2 and Ph groups mediated by a platinum cluster: synthesis and crystal structure of the butterfly cluster [Pt3(µ3-AgO2CCF3)(µ-PPh2)3Ph(PPh3)2]·C6H6

Recombination of a PPh2 bridge and a terminal Ph group, originally produced by P–C bond breaking of PPh3 in a Pt complex, is achieved by the two-electron oxidation of the cluster [Pt3(µ-PPh2)3Ph(PPh3)2] 1 with I2, followed by reductive coupling of both fragments, thus restoring a PPh3 ligand in the cationic cluster [Pt3(µ-I)(µ-PPh2)2(PPh3)3]I 2; the electron-rich character of 1 is evidenced by its reaction with AgO2CCF3 which leads to the formation of the structurally characterized [Pt3(µ3-AgO2CCF3)(µ-PPh2)3-Ph(PPh3)2] 3.

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