查看更多>>摘要：The results of studying heterometallic complexes Ln(III)-Cd(II) with anions of aromatic and aliphatic monocarboxylic acids are generalized. A number of substantial features is observed in complexes Ln(III)-Cd(II), but they are not characteristic of compounds Ln(III)-M(II) with 3d-metal ions (M = Co, Ni, Cu, Zn). A tendency of the cadmium(II) complexes to form coordination polymers at the compositions typical of the molecular 3d-metal complexes is shown. The effect of the substituent in benzoic acid on the structures and photoluminescence properties of the heterometallic Ln(III)-Cd(II) complexes is revealed.
查看更多>>摘要：Three new complexes from the family of 3d-metal fluorocarboxylatometallates are synthesized and studied. Isotypical complex compounds K[Co3(μ3-F)(CF3COO)6(CH3COOH)3](CH3COOH) (I) and K[M3(μ3-F)(CF3COO)6(CH3COOH)3](CH3COOH)0 6(CF3COOH)_(0.4) (II) are analogs of potassium fluo-rotrifluoroacetatometallates(II) in which axial ligands are replaced by acetic acid molecules. Complex NH4[Ni3(μ3-F)(CH3COO)6(CH3COOH)3](CH3COOH)6 (III) is the first example of fluorocarboxylate with acetate bridging ligands. The presence of acetic acid in the system results in an increase in the coordination number of alkaline metal and (due to the formation of a developed system of hydrogen bonds) in an increase in the dimensionality of the structure from the chain one in the earlier studied analogs to the layered structure. The structure of the complex fluorocarboxylate anion in compound III resembles those of fluoro-trifluoroacetate analogs I and II, the character of interaction of the complex anion with the single-charge cation is retained, and the structure exists in the form of corrugated layers formed by chains linked via hydrogen bonds with the solvate molecules of acetic acid (CIF files CCDC nos. 2124887 (I), 2124888 (II), and 2127163 (III)).
查看更多>>摘要：The reaction of cymantrenates M[(OOC5CH4)Mn(CO)3]2(MeOH)4 (M = Zn, Co(II), Ni(II)) with pyrazole (HPz) results in replacement of labile methanol molecules by the heterocyclic ligand and gives mononuclear complexes Zn[(OOCC5H4)Mn(CO)3]2(HPz)2 (I), Ni[(OOCC5H4)Mn(CO)3]2(HPz)4 (II), and Co[(OOCC5H4)Mn(CO)3]2(HPz)4 (III). A similar reaction of cobalt cymantrenate with more basic and sterically bulky 3,5-dimethylpyrazole (HDmpz) gives the complex Co[(OOCC5H4)Mn(CO)3]2(HDmpz)2 (IV). Compounds I-IV were characterized by X-ray diffraction (CCDC nos. 2157671 (I), 2157672 (II), 2157669 (III), and 2157670 (IV)), IR spectroscopy, and elemental analysis.
查看更多>>摘要：A possibility of generating spin polarization of ~(19)F nuclei in the counterions that form no covalent bond with the metal center is shown for the first time for new iridium complexes synthesized by reversible binding with the substrate (pyridine) and parahydrogen. This makes it possible to observe the integral polarization of ~(19)F nuclei in weakly coordinated tetrafluoroborate and hexafluorophosphate anions. The optimum parameters of the magnetic field strength for the maximum amplification of the ~(19)F signal in two fluorine-containing anions are determined from the dependences of the signal intensity in the NMR spectra on the magnetic field strength for two synthesized iridium complexes.
查看更多>>摘要：Two new uranyl complexes are synthesized: [Co(H2O)6][UO2(Mac)3]2·8H2O (I) and {Ca(H2O)2[UO2(Mac)3]2} (II) (Mac is methacrylate ion CH2C(CH3)COO~-). The crystals of complexes I and II are studied by the X-ray diffraction method (CIF files CCDC nos. 2124087 (I) and 2124088 (II)) and IR spectroscopy. The uranyl-containing structural units of the crystals of compounds I and II are mononuclear complexes [UO2(Mac)3]~- with the crystal chemical formula AB3~(01) (A= UO2~(2+), B~(01) = Mac). In the crystals of complex I, the [UO2(Mac)3]~- complexes coexist with octahedral aqua complexes [Co(H2O)6]~(2+) and outer-sphere water molecules. In the crystals of complex II, each calcium ion binds two water molecules and two [UO2(Mac)3]~- anions to form trinuclear electroneutral complexes {Ca(H2O)2(UO2)2(Mac)6} with the crystal chemical formula A'M2~1B2~(01)B4~(11) (A = Ca~(2+), A = UO2~(2+), B~(01) and B~(11) = Mac, M~1 = H2O). In compound II, the uranium-containing complexes are joined into a 3D framework through intermolecular contacts, which are characterized using the method of molecular Voronoi-Dirichlet polyhedra.
查看更多>>摘要：Ionic complexes of palladium(II) with mononuclear anions [Ph3PEt][PdBr3(DMSO)] (I), [Ph3PCH2OMe][PdBr3(DMSO)] (II), [Ph3PC5H9-cyclo][PdBr3(DMSO)] (III), and [Ph3PCH2CH= CHCH2PPh3][PdBr3(DMSO)]2 (IV) are synthesized from organyl triphenylphosphonium bromide and pal-ladium(II) bromide in the presence of hydrobromic acid. The structures of the complexes are determined by X-ray diffraction (CIF files CCDC nos. 2115506 (I), 2115228 (II), 888748 (III), and 2115007 (IV)). The complexes contain organyltriphenylphosphonium cations and [PdBr3(DMSO)] anions.
查看更多>>摘要：A new compound, [Cu2~(II)Cl(2,2'-Bipy)4]{[Cu~(II)(2,2'-Bipy)2][BW_(12)~(VI)O_(40)]}-2H2O (I) (2,2'-Bipy = 2,2'-bipyridine), has been hydrothermally synthesized and characterized by elemental analysis, infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), thermal gravimetric (TG) analysis, power X-ray diffraction (PXRD) and X-ray single-crystal diffraction analysis (CCDC no. 1936106). Compound I consists of a Keggin polyoxotungstate mono-supported Cu~(II)-2,2'-Bipy complex, a dinuclear Cl-bridged Cu(II) complex and two water molecules. The [Cu2 Cl(2,2'-Bipy)4]~(3+) unit is a counter ion which is anchored to the polyanion via non-covalent intermolecular interaction. In addition, the fluorescence and both the catalytic performance for the epoxidation styrene and the photocatalytic property for degradation of Rhodamine B (RhB), Methylene blue (MB) and RhB + MB aqueous solutions under UV irradiation of compound I have been investigated and shown good properties.
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