Organometallic chemistry of diphosphazanes. Rhodium(I) complexes of RN(PX2)2 (R = C6H5; X = OC6H5, OC6H4Br−p, R = CH3; X = OC6H5) |
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| Authors: | Maravanji S Balakrishna Setharampattu S Krishnamurthy |
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| Institution: | Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India |
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| Abstract: | Reactions of Rh(COD)Cl]2 with the ligand RN(PX2)2 (1: R = C6H5; X = OC6H5) give mono- or disubstituted complexes of the type Rh2(COD)Cl2{ν2?C6H5N(P(OC6H5)2)2}] or RhCl{ν2?C6H5 N(P(OC6H5)2)2 }]2 depending on the reaction conditions. Reaction of 1 with Rh(CO)2Cl]2 gives the symmetric binuclear complex, Rh(CO)Cl{μ?C6H5N(P(OC6H5)2)2} 2, whereas the same reaction with 2 (R = CH3; X = OC6H5) leads to the formation of an asymmetric complex of the type Rh(CO)(μ?CO)Cl{μ?CH3N(P(OC6H5)2)2}2 containing both terminal and bridging CO groups. Interestingly the reaction of 3 (R = C6H5, X = OC6H4Br?p with either Rh(COD)Cl]2 or Rh(CO)2Cl]2 leads only to the formation of the chlorine bridged binuclear complex, RhCl{ν2?C6H5N(P(OC6H4Br?p)2)2}]2. The structural elucidation of the complexes was carried out by elemental analyses, IR and 31P NMR spectroscopic data. |
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| Keywords: | Diphosphazane complexes Chelation Rhodium complexes |
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