.pi.-Localization in aromatic ligands: formation of mixed-metal .eta.2:.eta.2-.mu.-arene complexes of ruthenium(II) and osmium(II) ammines
作者:W. Dean. Harman、Henry. Taube
DOI:10.1021/ja00230a056
日期:1988.10
Tandem 1,4-Addition Reactions with Benzene and Alkylated Benzenes Promoted by Pentaammineosmium(II)
作者:Fei Ding、Michael E. Kopach、Michal Sabat、W. Dean Harman
DOI:10.1021/ja020279e
日期:2002.11.1
Electrophiles such as dimethoxymethane and 3-penten-2-one react with the complex [Os(NH(3))(5)(eta(2)-benzene)](2+) in the presence of triflic acid to form metastable benzenium intermediates. These benzenium intermediates further react with carbon nucleophiles including silyl ketene acetals, (silyloxy)alkenes, and phenyllithium in an overall tandem 1,4-addition sequence. The metal fragment controls