作者:Fabian G. Schröder、Jörg Sundermeyer
DOI:10.1021/om501325h
日期:2015.3.23
The 9-fluorenylidene phosphorane Me3P-Flu (2) is easily accessible by deprotonation of [Me3P+-FluH]Br- (1). Its selective deprotonation in diethyl ether yielded the phosphonium di- and triylides [(Et2O)LiCH2-PMe2-Flu}](2) (3) and [(Et2O)Li-2(CH2)(2)PMe-Flu}](2) (4), respectively. Both complexes crystallize as dimers, exhibiting bridging ylidic methylene fragments. Moreover, the fluorenylidene moieties also act as soft ligands in the vicinity of lithium.