191545-57-0Relevant academic research and scientific papers
Reactivity of [Cp*Re(η3-C3H5)(CO)2][BF4] towards oxygen, sulfur, nitrogen and carbon nucleophiles
He, Ying-Xia,Batchelor, Raymond J.,Einstein, Frederick W.B.,Peterson, Louis K.,Sutton, Derek
, p. 27 - 39 (1997)
The nucleophilic addition of oxygen, sulfur, nitrogen and carbon nucleophiles to [Cp*Re(η3-C3H5)(CO)2][BF4] (1) has been investigated. In all cases, addition of the nucleophile to the allyl ligand in 1 was observed to result, giving the substituted propene complexes with general formula Cp*Re(CO)2(2-C3H5R) (R = CH3CO2, C2H5S, C6H5S, NH2, N3, CHMe2 and C6H5) and [Cp*Re(CO)2]2(η2;η2-C3H5S(CH2)3SC3H5). No product of attack at the central carbon was observed for any of the nucleophiles. In the cases where the nucleophile was NH-2 or C6H5Li, nucleophilic addition occurred either at the η3-allyl or at a CO ligand. At low temperature (-78-0°C) the CO was attacked and complexes with general formula Cp*Re(η3-C3H5)(CO)(COR) (R = NH2 and C6H5) were produced. When R is C6H5, the product was stable and was observed along with the substituted propene complex in solution, but when NH-2 was used, the carbamoyl complex converted completely to the substituted propene complex at room temperature. A by-product of the method used to synthesize Cp Cp* Re(η2-C3H5SC6H5)(CO)2 was a small amount of Cp*Re(η3-C3H5)(CO)(O2CSC6H5) (7). The X-ray crystal structure of 7 has been determined.
