Transition metal chemistry of phosphorus based ligands. Ruthenium(II) chemistry of bis(phosphino)amines, X2PN(R)PX2 (R=H or Ph, X=Ph; R=Ph, X2=O2C6H4) |
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Authors: | Maravanji S Balakrishna Krishna Ramaswamy Rita M Abhyankar |
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Abstract: | Reactions of CpRuCl(PPh3)2 with bis(phosphino)amines, X2PN(R)PX2 (1 R=H, X=Ph; 2 R=X=Ph; 3 R=Ph, X2=O2C6H4) give neutral or cationic mononuclear complexes depending on the reaction conditions. Reaction of 1 with CpRuCl(PPh3)2 gives one neutral complex, CpRu(Cl)(η2-Ph2PN(H)PPh2)] (4) and two cationic complexes, CpRu(η2-Ph2PN(H)PPh2)(η1-Ph2PN(H)PPh2)]Cl (5) and CpRu(PPh3)(η2-Ph2PN(H)PPh2)]Cl (6), whereas the reaction of 2 with CpRuCl(PPh3)2 leads only to the isolation of cationic complex, CpRu(PPh3)(η2-Ph2PN(Ph)PPh2)]Cl (7). The catechol derivative 3, in a similar reaction, affords an interesting mononuclear complex CpRu(PPh3){η1-(C6H4O2)PN(Ph)P(O2H4C6)}2]Cl (8) containing two monodentate bis(phosphino)amine ligands. The structural elucidation of the complexes was carried out by elemental analyses, IR and NMR spectroscopic data. |
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Keywords: | Bis(phosphino)amines Mononuclear Ruthenium(II) complexes Cationic Monodentate Bidentate |
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