Darstellung, Charakterisierung und molekülstruktur des η 2-acylkomplexes C 5Me 5(CO)(CF 3COO) 2[formula omitted])CH 2CH 2COMe

Abstract

The reaction of the five-membered metallacyclic alkenylketone complex C 5Me 5(CO) 2 W[HC=CHC(O) )Me (I) with CF 3COOH yields the η 2-acyl complex C 5Me 5(CO(CF 3COO) 2 W[η 2-C(O )CH 2CH 2COMe] (II). Compound II was identified from elemental analysis, by IR, 1H, 13F NMR spectroscopy and X-ray diffraction analysis. Thermolysis of II leads to elimination of one CO and formation of the alkyl complex cis-C 5Me 5(CO)(CF 3COO) 2W(CH 2CH 2COMe) (III). The reaction of II with HCl gives the substitution product C 5Me 5(CO)(Cl) 2 W[η 2C(O ))CH 2CH 2COMe] (IV).