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Preparation of benzophenone imine complexes of transition metals
Authors:Gabriele Albertin  Stefano Antoniutti  Alberto Magaton
Affiliation:Dipartimento di Chimica, Università Ca’ Foscari di Venezia, Dorsoduro, 2137, 30123 Venezia, Italy
Abstract:Benzophenone imine [M(η1-NHCPh2)(CO)nP5-n]BPh4 [M = Mn, Re; n = 2, 3; P = P(OEt)3, PPh(OEt)2, PPh2OEt, PPh3] complexes were prepared by allowing triflate M(κ1-OTf)(CO)nP5-n compounds to react with an excess of the imine. Hydride-imine [MH(η1-NHCPh2)P4]BPh4 (M = Ru, Os), triflate-imine [Os(κ1-OTf)(η1-NHCPh2)P4]BPh4 and bis(imine) [Ru(η1-NHCPh2)2P4](BPh4)2 [P = P(OEt)3] derivatives were also prepared. The complexes were characterized spectroscopically (IR, 1H, 31P, 13C NMR) and a geometry in solution was also established. Hydride-benzophenone imine [IrHCl(η1-NHCPh2)L(PPh3)2]BPh4and [IrHCl(η1-NHCPh2)L(AsPh3)2]BPh4 [L = P(OEt)3 and PPh(OEt)2] complexes were prepared by reacting hydride IrHCl2L(PPh3)2 and IrHCl2L(AsPh3)2 precursors with an excess of imine. Dihydride IrH21-NHCPh2)(PPh3)3 complex was also obtained and a geometry in solution was proposed.
Keywords:Benzophenone imine complexes   Manganese and rhenium   Ruthenium and osmium   Iridium   Phosphite ligands   Synthesis
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