THE REACTION OF THE PRECURSOR PHCCO(3)(CO)(9) WITH NAW(CO)(3)(RCP) - CHARACTERIZATION AND CRYSTAL STRUCTURE OF THE CLUSTERS (MU(3)-CPH)CO2W(CO)(8)(RCP) (R=HCO, CH3CO, C2H5OCO)

摘要

mu(3),-Phenylmethylidyne trimetal carbonyl clusters (mu(3)-CPh)Co2W(CO)(8)(RCp) (2a:R = HCO;3a:R = CH3CO;4a: R = C2H5OCO) have been obtained from a solution of the precursor (mu(3)-CPh)Co-3(CO)(9) refluxing with the metal exchange reagents NaW (CO)(3)(RCp) in THF. The results Showed that electron-withdrawing groups on the cyclopentadienyl affected the activity of the metal exchange reagents NaW(CO)(3)(RCp) and the above reaction was accelerated thermally. The results further showed that the metal carbonyl unit Co(CO)(3) in the precursor PhCCo(3)(CO)(9) can be exchanged by the organometallic group W(CO)(2)(RCp). The clusters were characterized by C/H analysis, IR and H-1 NMR and by crystal structure determination for cluster 3a. [References: 12]