Wiley, Chemistry - A European Journal, 51(20), p. 16781-16781, 2014
Wiley, Chemistry - A European Journal, 51(20), p. 16899-16912, 2014
Wiley, Chemistry - A European Journal, 51(20), p. 16785-16785, 2014
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A bis(phosphine)borane ambiphilic ligand, [Fe(η5-C5H4PPh2)(η5-C5H4PtBu{C6H4(BPh2)-ortho})] (FcPPB), in which the borane occupies a terminal position, was prepared. Reaction of FcPPB with tris(norbornene)platinum(0) provided [Pt(FcPPB)] (1) in which the arylborane is η3BCC-coordinated. Subsequent reaction with CO and CNXyl (Xyl=2,6-dimethylphenyl) afforded [PtL(FcPPB)] {L=CO (2) and CNXyl (3)} featuring η2BC- and η1B-arylborane coordination modes, respectively. Reaction of 1 or 2 with H2 yielded [PtH(μ-H)(FcPPB)] in which the borane is bound to a hydride ligand on platinum. Addition of PhC2H to [Pt(FcPPB)] afforded [Pt(C2Ph)(μ-H)(FcPPB)] (5), which rapidly converted to [Pt(FcPPB′)] (6; FcPPB′=[Fe(η5-C5H4PPh2)(η5-C5H4PtBu{C6H4(BPh-CPh=CHPh-Z)-ortho}]) in which the newly formed vinylborane is η3BCC-coordinated. Unlike arylborane complex 1, vinylborane complex 6 does not react with CO, CNXyl, H2 or HC2Ph at room temperature.