Chloral polymerizations initiated with weak chiral initiators, used at 0.5 mol% concentration, gave optically active polychloral. Maximum rotations of the various polychloral samples, measured in film gorm, depended on the initiator as follows: tetramethylammonium (+)-O-acetylmandelate [α]D25= -1860°, tetramethylammonium (-)-O-acetylmandelate [α]D25= +1180°, tetramethylammonium (+)-α-methoxymandelate [α]D25= -190°, tetramethylammonium (-)-α-methoxymandelate [α]D25= +210°.