反应条件
C5H5Na in tetrahydrofuran under N2, soln. of CoBr2*DME in THF cooled to -78°C, soln. of NaCp in THF added dropwise with stirring, C2Ph2 added at -80°C, allowed to warm to room temp. during 2 h; concd., extd. with pentane and with toluene, solid filtered off, washedwith toluene, pentane ext. passed through CuCl, combined with toluene exts., concd., chromd. (alumina/4percent H2O, pentane/CH2Cl2), sublimed at 1 Paat 170 and 175-185°C;
参考文献
Journal of Organometallic Chemistry, , vol. 233, # 2 p. 253 - 258
