Phenyl(1,1-dichloroethyl)mercury has been prepared via 1,1-dichloroethyllithium and evaluated as a potential CH3CCl transfer agent. Although this mercurial reacted with triethylsilane to give Et3SiCHClCH3 (35%) and with allyltrimethylsilane to give 1-chloro-1-methyl-2-(trimethylsilylmethyl)cyclopropane (31%), its principal mode of reaction involved elimination of hydrogen chloride. The products resulting