摘要
The reactions of dusters (μ3- CCO2Et)Co2M (CO)8(MeCp)[M = Mo(2a),W(2b)], derived from the reaction of (μ3-CCO2Et)Co3(CO)9 with Na[M(CO)3(MeCp)], with Na2[Fe(CO)4] in THF at reflux not only gave the expected metal fragment exchange products (μ3-CCO2Et) FeCoM (CO)6(Me-Cp )H [M=Mo(3a), W(3b)] but also produced the unexpected compounds (μ3-CCO)FeCoM (CO)5(MeCp) [M=MO(4a), W(4b)]. It is suggested that the formation of two kinds of compounds resulted from two competitive reactions of the intermediates [(μ3-CCO2Et) FeCo M(CO)8,(MeCp)] with 11+: the one is the Protonic reaction of the intermediate giving the cluster 3a,b; the another one is the intermolecular nucleophilic substitution reaction of the intermediate under the H+ catalytic action giving the cluster 4a,b.
The reactions of dusters (μ3- CCO2Et)Co2M (CO)8(MeCp)[M = Mo(2a),W(2b)], derived from the reaction of (μ3-CCO2Et)Co3(CO)9 with Na[M(CO)3(MeCp)], with Na2[Fe(CO)4] in THF at reflux not only gave the expected metal fragment exchange products (μ3-CCO2Et) FeCoM (CO)6(Me-Cp )H [M=Mo(3a), W(3b)] but also produced the unexpected compounds (μ3-CCO)FeCoM (CO)5(MeCp) [M=MO(4a), W(4b)]. It is suggested that the formation of two kinds of compounds resulted from two competitive reactions of the intermediates [(μ3-CCO2Et) FeCo M(CO)8,(MeCp)] with 11+: the one is the Protonic reaction of the intermediate giving the cluster 3a,b; the another one is the intermolecular nucleophilic substitution reaction of the intermediate under the H+ catalytic action giving the cluster 4a,b.
