helix induction and subsequent static helicity memory in a poly(biphenylylacetylene) were achieved using a catalytic amount of nonracemic ammonium salts with non-coordinating tetrakis[3,5-bis(trifluoromethyl)phenyl]borate as a counter anion. Helix induction relies on crown-ether-like specific intermolecular complex formation of the two methoxymethoxy groups of the biphenyl pendants with chiral ammonium