Abstract
Regular conformations of low energy of isotactic poly(triphenylmethyl methacrylate) have been deduced by conformational energy calculations on suitable models of this polymer. The lowest energy corresponds to helices with 3.6 monomer units per turn and 2.0 A pitch per monomer unit. The CPh sub 3 groups are firmly locked in place in this conformation by interactions with phenyl rings belonging to neighbouring units. 9 ref.--AA