科研之友
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摘要
A new 3D rare-earth coordination polymer [Ce-2 (H(2)btc) (btc) (H2O)(2)](n) (1) was hydrothermally synthesized and its structure was characterized by the single crystal X-ray diffraction. Compound I crystallizes in a triclinic crystal system, space group P1 with a=0.641 17(13) nm, b=0.939 41(19) nm, c= 0.957 97 (19) nm, alpha= 103-888 (17)degrees, beta= 74. 57 (3)degrees, gamma= 76. 71 (3)degrees, V= 0.540 98(19) nm(3), Z = 1, R= 0.026 4, omegaR(2) = 0. 077 9. The three-dimensional compound 1 is built by linking one crystallographically independent nine-coordination Ce (III) subunit through the btc and the H(2)btc ligands. Each nine-coordinate Ce (III) unit is a distorted tricapped trigonal prism, of which eight oxygen atoms belong to six different carboxylate groups of btc or H(2)btc and a water molecule, with the Cc(III)-O bond lengths ranging from 0. 240 3(3) nm to 0. 263 6(3) nm.
