Screw sense differentiating polymerization of achiral isocyanides
Abstract
Polymerization of achiral isocyanides p-XC6H4NC (X = MeO, Me, H, Cl)by nickel(II) chloride in the presence of (S)-2-isocyanoisovaleric acid methyl or t-butyl ester gives rise to optically active polymers [p-XC6H4NC]n with an excess of right-handed screw sense.