Reactivity of [(2-Phosphino)ethenyl]zirconocene Chloride toward CpM(CO)<sub>3</sub>Cl (M = Mo, W): Formation of [(3-Phosphino)propenoyl]dicarbonyl(cyclopentadienyl)metal, {CpM(CO)<sub>2</sub>[(CO)CRCRPPh<sub>2</sub>]}
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Reaction of [(2-phosphino)ethenyl]zirconocene chloride (1) with CpM(CO)3Cl (M = Mo, W) in THF yielded the [(3-phosphino)propenoyl]dicarbonyl(cyclopentadienyl)metals {CpM(CO)2[(CO)CRCRPPh2]} (2). When the reaction between [(2-phosphino)ethenyl]zirconocene chloride (1) and CpMo(CO)3Cl was carried out in the presence of a catalytic amount of Pd(CH3CN)2Cl2, [(3-phosphino)propenoyl]dicarbonyl(cyclopentadienyl)molybdenum, {CpMo(CO)2[(CO)CRCRPPh2]}, was exclusively observed. When [(2-phosphino)ethenyl]zirconocene chloride (1) and MeCpW(CO)3Cl were reacted in the presence of a catalytic amount of CuCl, [(3-phosphino)propenoyl]dicarbonyl(methylcyclopentadienyl)tungsten, {MeCpW(CO)2[(CO)CRCRPPh2]}, was formed. Their structures are determined by X-ray diffraction analysis.
