The synthesis of 4,4'-(dimethylsilylene)bis(phenyl chloroformate) and 4,4'-(dimethylgermylene)bis(phenyl chloroformate) is described according to the same route for the synthesis of bisphenol-A bischloroformate. These compounds were characterized using elemental analysis, FT-IR and NMR spectroscopy. Poly(urethanes) derived from these bischlororformates containing silicon or germane in the main chain, were obtained in benzene solution by reaction with 4,4'-methylenedianiline in the presence of pyridine. Poly(urethanes) were characterised by spectroscopic methods and the thermal properties (Tg and thermal stability) were compared with the homologue poly(urethane) obtained from bisphenol-A chloroformate.