Trimethylsilyl N-(4-bromophenyl)carbamate, C10H14BrNO2Si, and trimethy
lsilyl N-tert-butyl-N-phenylcarbamate, C14H23NO2Si, are both important
silylating agents. The structures of both molecules are dominated by
a plane containing a remarkably large number of atoms. The planes are
organized by delocalization around the carbamate moiety. A quasi-penta
coordination of the Si atom in both compounds is also described.