Wenhua Bi

A novel Sm–Co polymeric complex formed via metal-mediated oxidation–hydrolysis of orotic acid in a hydrothermal reaction

Abstract A novel Sm–Co coordination polymer constructed by orotic acid (2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid, H3dtpc) and oxalate (ox2−), {[Sm2Co(ox)2(Hdtpc)2(H2O)6]·2H2O}n (1), was prepared by metal-mediated oxidation–hydrolysis of orotic acid in a hydrothermal reaction. Crystallographic data for 1: triclinic, space group P−1 with a=8.2266(4), b=9.2895(4), c=9.7934(5) A , α=75.347(1), β=69.708(1), γ=72.665(2)°, V=660.66(5) A 3 , Z=2, Dc =2.4832 g / cm 3 . Magnetic susceptibility measurement for 1 is consistent with the existence of weak anti-ferromagnetic interaction.

[Zn2(H2O)3(2,2′-bipy)2(btc)][Zn(H2O)(2,2′-bipy)(btc)] ·8H2O: a novel zinc–carboxylate complex consisting of independently cationic and anionic chains

A novel zinc complex, [Zn 2 (H 2 O) 3 (2,2 ′ -bipy) 2 (btc)][Zn(H 2 O)(2, 2 ′ -bipy)(btc)]·8H 2 O ( 1 ), (H 3 btc=1,3,5- benzenetricarboxylic acid, 2,2 ′ -bipy=2,2 ′ -bipyridine) has been prepared by hydrothermal reaction of H 3 btc, Zn(CH 3 CO 2 ) 2 ·2H 2 O and 2,2 ′ -bipyridine at 180 °C and characterized by single-crystal X-ray diffraction analysis. Complex 1 consists of independently cationic and anionic chains. The hydrogen bonding interactions between chains extend 1 into a two-dimensional supramolecular architecture.

Isomer separation, conformation control of flexible cyclohexanedicarboxylate ligand in cadmium complexesElectronic supplementary information (ESI) available: NMR spectra for chdcH2 under different conditions, XRPD patterns and the ??? stacking information for the two complexes. See http://www.rsc.org/suppdata/cc/b4/b407405j/

Two 2D cadmium coordination polymers have been prepared using flexible 1,4-cyclohexanedicarboxylic acid (chdcH2) under hydrothermal condition, the conformations of chdcH2 were separated completely in the synthetic reactions.

A three-dimensional coordination framework containing μ4-sulfate anions [Cd(μ4-SO4)(bpy)]n (bpy=4,4′-bipyridine)

Abstract The reaction of 3CdSO4·8H2O with 4,4′-bipyridine (bpy) in aqueous solution gives rise to a coordination polymer [Cd(μ4-SO4)(bpy)]n (1). X-ray single-crystal diffraction analyses reveal that the compound in space group P21212 creates a three-dimensional structure with unusual μ4-sulfate-bridges.

Syntheses and structures of two novel copper complexes constructed from unusual planar tetracopper(II) SBUs

Two novel polymeric copper complexes constructed from unusual planar tetracopper(II) SBUs have been prepared and characterized.

Exploring the synthesis of infinite helical chains with 2-carboxycinnamic acid

The hydrothermal reactions of Cd(NO3)2, 2-ccm and secondary N,N-ligands gave rise to four coordination polymers, [Cd(ccm·L·xH2O)·yH2O]n, [ccm = 2-carboxycinnamic acid, L = 2,2′-bipyridine, x = y = 1 (1); 1,10-phenanthroline, x = y = 1 (2); 1,3-di(4-bipy)propane, x = y = 1 (3) and 4,4′-bipyridine, x = 0, y = 4 (4)]. The structures of the resulting complexes appear to be tuned by secondary ligands. When the secondary ligands change from terminal ligands, via flexible bridging ligands, to rigid bridging ligands, the resulting compounds are observed to self-assemble into single-stranded helical chains (1 and 2), double-stranded zigzag chains (3) and 2D networks (4), respectively. This result provides a useful strategy to manipulate the design and synthesis of helical structures.

Formation of a sandwich-type supercomplex through second-sphere coordination of functionalized macrocyclic polyamines

A novel sandwich-type supercomplex, namely {[Er(TETA)]2Er(H2O)8}NO3·10H2O (1), has been self-assembled through the conjoined hydrogen bonds by using a tetraaza-functionalized macrocyclic polyamine ligand, showing complete incorporation of the octahydrate lanthanide cation between the second coordination spheres.

Observation of the least stable conformer of 1,4-cyclohexanedicarboxylic anions in a samarium coordination architecture

The least stable conformer a,a-trans-chdc2− of the flexible ligand, 1,4-cyclohexanedicarboxylic anion, is observed in a samarium coordination polymer, namely [Sm2(H2O)4(e,e-trans-chdc)2(a,a-trans-chdc)]·6H2O, which contains mixed e,e-trans-chdc2− and a,a-trans-chdc2− (2:1).

(2,2′-Bi­pyridine-κ2N,N′)­di­chloro­copper(II)

The title compound, [CuCl2(C10H8N2)], has twofold symmetry and the coordination geometry around the CuII atom is distorted square-planar. There are weak intermolecular Cu⋯Cl interactions, forming a chain structure in the crystal.