摘要:
Trichloro- and trifluoroacetic acids CF(3)COOh and CCl3COOH react with cationic eta(2)-phosphino-(Cp(CO)(PMe3)-W=C(R)-PPh2(BF4) as well as eta(2)-arsinocarbene complexes of tungsten (Cp(CO)(2)W=C(R)-AsPh2)(PF6) to form the corresponding eta(2)-phosphinomethanide (Cp(CO)(PMe3)(Y)W-C(H)(R)-PPh2)(BF4) (Y = CF3COO, CCl3COO) or eta(2)-arsinomethanide compounds (Cp(CO)(2)(CF3COO)W-C(H)(R)-AsPh2)(PF6), respectively. Next to spectroscopic investigations, the constitution of the new compounds is proved by X-ray single crystal structure determinations. (C) 1999 Elsevier Science S.A. All rights reserved.