摘要:
The carbonyl-free, half-sandwich molybdenum(II) complexes CpMoCl(triphos) (1) and IndMoX(triphos) [X = Cl (2); I (3); triphos = Ph(2)PCH(2)CH(2)P(Ph)CH(2)CH(2)PPh(2); Ind = eta(5)-C7H9 or indenyl] have been synthesized by either reduction of CpMoCl(2) in the presence of triphos or by reduction and transmetallation of MoX(3)(triphos) (X = Cl, I) with CpNa or IndNa. The spectroscopic properties indicate a saturated, 18-electron structure in each case. All compounds are susceptible to oxidation in chlorinated hydrocarbons and the oxidation of 1 has been studied in detail both chemically and electrochemically. Compound [1](PF6-)-P-+ has been obtained by oxidation of 1 with AgPF6, whereas the corresponding AlCl4- salt has been prepared in a one-pot reaction from CpMoCl(2), triphos and AlCl3. The structure of 1 has been confirmed by X-ray crystallography as a four-legged piano stool with an eta(5)-cyclopentadienyl ring and a tridentate triphos ligand. Copyright (C) 1996 Elsevier Science Ltd.