Novel one-dimensional lanthanide acrylic acid complexes: an alternative chain constructed by hydrogen bonding

摘要

Novel one-dimensional (1D) chains of three lanthanide complexes La(L-1),(CH3OH)] (.) CH3OH (L-1 = (E)-3-(2-hydroxyl-phenyl)acrylic acid) 1, La(L-2), (H2O)(2)] (.) 2.75H(2)O (L-2= (E)-3-(3-hydroxyl-phenyl)-acrylic acid) 2, and La(L-3)(3)(CH3OH)(2)(H2O)] (.) CH3OH L =(E)-3-(4-hydroxyl-phenyl)-acrylic acid) 3 are reported. The crystal structure data are as follows for 1: C29H29LaO11, monoclinic, P2(1), a=15.4289(12) Angstrom, b=7.9585(6) Angstrom, c=23.041(2) Angstrom, beta=99.657(2)degrees, Z=4, R-1=0.0637, wR(2) = 0.0919; for 2: C27H30.50LaO13.75, triclinic,P-1, a=8.4719(17) Angstrom, b=13.719(3) Angstrom, c=14.570(3) Angstrom, alpha=62.19(3)degrees, beta=99.657(2)degrees, gamma = 78.22(3)degrees,Z=2, R-1=0.0384. wR(2)=0.0820; and for 3: C30H35LaO13, monoclinic, P2(1)/c, a=9.5667(6) Angstrom, b=24.3911(15) Angstrom, c=14.0448(9) Angstrom, beta=109.245(2)degrees, Z=4, R-1=0.0374, wR(2)=0.0630. All the three structure data were collected using graphite monochromated molybdenum Kalpha radiation and refined using full-matrix least-squares techniques on F-2. These structures show that four kinds of the carboxylato bridge modes are included in these chains to link the La(III) ions. It is the first time that it has been found that the intra-chain hydrogen bonding can construct an alternative chain even, when the coordination bridge mode is the same along the chain (complex 2). There are 2D and 3D hydrogen bonding in the crystal lattices of complexes 1-3. (C) 2004 Elsevier Inc. All rights reserved.