Two new polymeric chains derived from exo-bidentate binaphthol derivatives

Assembly of CdBr2·4H2O and 2,2′-substituted binol derivatives, (S)-2,2′-bis(4-pyridylmethyleneoxy)-1,1′-bi-naphthalene [(S)-L], and (Rac)-2,2′-bis(4-pyridylmethyleneoxy)-1,1′-bi-naphthalene [(Rac)-L], resulted in two one-dimensional chiral chain complexes, {Cd[(S)-L](H2O)Br2}n·0.5nH2O (1) and {Cd2[(R)-L][(S)-L](H2O)2Br4}n·2nH2O (2). In complex 1, chain chirality is from axial chirality of BINOL scaffold. In complex 2, racemic ligands including (S)-L and (R)-L locate in the two sides of the equatorial plane, which suggests the ligand self-discrimination during the assembly process.