Jin S.,Zhe Jiang A and iversity |
Wang D.,Liaocheng University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2013
Five organic-inorganic hybrid complexes [(HL1)2(CdCl 4)] · H2O (1), (L1 = 2-methylquinoline); [(HL1)2(CoCl4)] · H2O (2), [(HL2) 2(CuCl4)] (3), (L2 = 6-bromobenzo[d]thiazol-2-amine), [(HL3)2(ZnCl4)] · 2H2O, (4), (L3 = 5,7-dimethyl-1,8-naphthyri- dine-2-amine), and [(H2L4)(Cu 2Cl8)0.5], and (5) (L4 = 3,6-bis(imidazol-1-yl) pyridazine) derived from N-containing aromatic Brønsted bases and metal(II) chloride (cadmium(II) chloride dihydrate, cobalt(II) chloride hexahydrate, copper(II) chloride dihydrate, and zinc(II) chloride) were prepared and characterized by IR, X-ray structure analysis, elemental analysis, and TG analysis. The aromatic rings of the cations in all of the compounds are essentially planar. On the structural level, the atomic arrangement of the title hybrid crystals can be described as built up by the perchlorometallates of Cd2+, Co2+, Cu2+, and Zn2+ associated to the organic cations through the multiple noncovalent associations. X-ray diffraction analysis revealed that complexes 1, 2, 4, and 5 have 3D network structures built from hydrogen bonds between the cations and chlorometallate anions, while 3 displays 2D doublesheet structure. The water molecules also played important role in structure extension in compounds 1, 2, and 4. The arrangements of the anions and cations in their solid state are dominated not only by the shape, size, and symmetry of the cations, but also by the different structure type of the chlorometallate anions as well as the hydrogen-bonded interactions existing in the crystal structures. Copyright © Taylor and Francis Group, LLC.
Jin S.,Zhe Jiang A and iversity |
Luo Y.,Zhe Jiang A and iversity |
Wang D.,Liaocheng University |
Shi J.,Zhe Jiang A and iversity |
And 3 more authors.
Zeitschrift fur Anorganische und Allgemeine Chemie | Year: 2014
Five imidazole/benzimidazole-based metal complexes, Cd(bim) 2(L1)2 (1) [L1 = 2-methyl-2-phenoxypropionate, bim = benzimidazole], Zn(im)2(L2)2 (2) [L2 = 3-(4-methoxyphenyl)acrylate, im = imidazole], Zn(im)2(L3)2 (3) [L3 = 3,4-(methylenedioxy)benzoate], [Cd(im)2(L3) 2]2·4H2O (4), and Cd(Bim) 2(L4)·CH3CH2OH·H2O (5) (L4 = 1,4-cyclohexanedicarboxylate), were obtained by the introduction of the carboxylates as coligands and are structurally characterized by different techniques including elemental analysis, IR spectra, TG, and single-crystal X-ray diffraction analysis. The X-ray crystal structure analyses reveal that these complexes display mononuclear to dinuclear structures with tetrahedral coordination spheres around each central zinc atom, and octahedral coordination sphere around each central cadmium atom. The imidazole ligands in all compounds are coordinated only in a monodentate fashion with their neutral nitrogen groups. The carboxylates coordinate to the metal in monodentate, chelating bidentate, and bridging bidentate fashions. The N-H⋯O hydrogen bonds from the NH donor of the neutral imidazole were found in all compounds. On the basis of X-ray crystallographic study the rich intra- and intermolecular noncovalent interactions (including classical hydrogen bonds, C-H⋯O, CH 2⋯O, CH3⋯O, CH2-N, C-H⋯π, CH3-π, O-H⋯π, and π-π interactions) are analyzed. The various nonbonding interactions in these compounds are responsible for different structures such as 3D network, 3D prismatic layer network, and 3D layer network structure. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.