Crystal Structure of Lanthanide-oxalate-pyridine-2,4-dicarboxylate Coordination Polymers Suggesting the Reductive Coupling of Carbon Dioxide to Oxalate

摘要

abstract_textpUnder the hydrothermal conditions, Nd(NO3)(3)center dot 6H(2)O reacted with pyridine-2,4-dicarboxylic acid (2,4-pydcH(2)) to give a 2D co-ordination polymer with the empirical formula of C16H18N2Nd2O18 center dot H2O (1). Pr(NO3)(3)center dot 6H(2)O also reacted with 2,4-pydcH(2) to give another 2D coordination polymer (C8H9NO9Pr)(2)center dot H2O (2). The structure of both polymers have been determined by X-ray diffraction. X-ray structural analyses show that both polymers contain bridging oxalate (C2O42-) ligands, which might have been formed by the coupling of two CO2-center dot radicals, released from pydc(2-) ligands./p/abstract_text