Two new coordination polymers: [M(phen)(e, a-cis-1,4-chdc)(H₂O)]_n (M=Mn and Cu; phen=1,10-phenanthroline; chdc=cyclohexanedicarboxylate)

Two new coordination polymers, [M(phen) (e, a-cis-1,4-chdc) (H₂O)]_n (M=Mn(1); M=Cu(2); chdc=cyclohexanedicarboxylic acid; phen=1,10-phenanthroline), were prepared under hydrothermal conditions and characterized by IR spectra and single crystal X-ray diffraction analysis. X-ray crystal structural analyses reveal that polymer 1 and 2 are isomorphic and belong to the monoclinic system. C₂₀H₂₀MnN₂O₅, P₂(1)/c, a=1.0235(2) nm, b=0.89134(19) nm, c=2.0466(4) mm, β=99.820(3)°, Z=4 for 1; and C₂₀H₂₀CuN₂O₅, P₂ (1)/c, a=1.0002(3) nm, b=0.8949(2) nm, c=2.0270(5) nm, β=99.694(3)°, Z=4 for 2. In the structures of 1 and 2, the 1,4-chdc ligand only possesses e, a-cis conformation although there are both cis- and trans-conformations in the raw material.