NICKELOCENE CHEMISTRY III. REACTIONS OF BROMO(η5-CYCLOPENTADIENYL)TRIPHENYL-PHOSPHINENICKEL WITH PHOSPHORUS, ARSENIC AND SULPHUR YLIDS

Article abstract of DOI:10.1016/S0022-328X(00)90110-4

The phosphorus ylids Ph3PCHR (R = Me, Et, Prⁿ, Prⁱ, Buⁿ, Cl, and OMe), and the ylids Ph3AsCH2, Me2SCH2, and Me2S(O)CH2 react with 5-C5H5)Br(PPh3)> at room temperature to give the complexes 5-C5H5)(PPh3)>Br, 5-C5H5)(PPh3)>Br, 5-C5H5)(PPh3)>Br and (η⁵-C5H5)(PPh3)>Br, respectively.These are readily converted into the corresponding hexafluorophosphate salts on reaction with ammonium hexafluorophosphate.Under more forcing conditions the stabilised ylid Ph3PCHCOPh gives a product believed tobe the complex 5-C5H5)>Br, isolated and characterised as its PF6^- salt.