名称:
Synthesis and Characterization of Cationic Palladium (6,6‘-Dimethoxybiphenyl-2,2‘-diyl)bis(diphenylphosphine) Complexes
摘要:
For compounds of the type [(MeO-BIPHEP)P6X(2)] (where MeO-BIPHEP is (6,6'-dimethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) and X is an anion with low coordination ability) one or both anions X, depending on their nature, are displaced in an outer coordination sphere due to water coordination. The compounds are easily reduced in methanolic solution. With the diaquo complex [{(S)-MeO-BIPHEP}Pd(H2O)(2)](OTf)(2) as starting material, the formation of the dimeric palladium(I) complex [{(S)-MeO-BIPHEP}Pd](2)(OTf)(2) is observed. In contrast, under CO pressure, the mu-hydrido mu-carbonyl binuclear palladium(I) complex [{(s)-MeO-BIPHEP}Pd(mu-H)(mu-CO)Pd{(S)-MeO-BIPHEP}]OTf is formed. The molecular structures of [{(S)-MeO-BIPHEP}Pd(H2O)(THF)](OTf)(2) and [{(S)-MeO-BIPHEP}Pd(OTfa)(2)] were determined by X-ray diffraction.