Two New Coordination Polymers: [M（phen）（e,a-cis-1,4-chdc）（H2O）]n（M=Mn and Cu; phen=1,10-phenanthroline; chdc=cyclohexanedicarboxylate）

1,4Cyclohexanedicarboxylicacid(1,4chdcH2)possessesachair typestructurewithcis andtrans conformations,soitcanconnectmetalionsindiffer entdirections.Hence,chdcmaybeagoodcandidate fortheconstructionofnovelcoordinationpoly mers1-9].AsshowninFig.19],conformationAis Fig.1TransformsbetweenthedifferentconformationsofchdcH2theleaststableandisabletochangetoitsconformer Beasily.However,itisalittlemoredifficultwhenC becomesBbecausetheαprotonsshouldbedeproto natedtoacceleratetheequilibriumalthoughBi…

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-rsy 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;andC20H20CuN2O5, P2(1)/c, a=1.000 2(3) nm, b=0.894 9(2) nm, c=2.027 0(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.