Chromium, molybdenum and tungsten carbonyl derivatives of an unusual oxygen tripod ligand

摘要: Abstract (Cyclopentadienyl)tris(diethylphosphito- P )cobaltate(1-), [(C 5 H )Co{P(O)-(OC 2 ) } 3 ] − , reacts as an oxygen tripod ligand L with (CH CN) M(CO) (M = Cr, Mo, W) in water to produce the tricarbonyl complexes [LM(CO) . These anions react N -methyl- -nitroso- p -toluenesulfonamide give nitrosyl compounds (NO)], Mo or W). Further substitution triethylphosphine yields [LMo(CO)(NO)(PEt )]. The air-stable and volatile hydride complex [LMo(CO) H] can be precipitated from aqueous solution of Na[LMo(CO) by addition acetic acid. Heating molybdenum 150°C vacuo results formation metalmetal bonded species [{LMo(CO) ]; this compound, containing formal seven-coordinate molybdenum(I), is rigid on NMR time scale at room temperature.