A transition metal complex Zn(mpc)2(H2O)2(Hmpc=3-methylpyrazole-5-carboxylic acid) has been synth-esized by the reaction of Hmpc with Zn(NO3) 2·6H2O using hydrothermal method,which was characterized by IR spe-ctra,elemental analysis and single-crystal X-ray structure analysis.The structure reveals that the complex crystallizes in the trigonal space group R3c with the ZnⅡ atom on a threefold axis,composed of one ZnⅡ atom,two independent mpc-ligands and two coordinated water.Hydrogen bonds link the molecules into a three-dimensional supramolecular architecture.Fluorescent analysis in the dilute EtOH solution shows that the title complex exhibits a broad fluorescent band at 471 nm upon photoexcitation at 280 nm and has a bathochromic shift of the emission energy compared with the free ligand,possibly due to metal-to-ligand charge transfer(MLCT) .CCDC:682402.
A novel heterometallic complex [Na2Cu2Gd2（pdc）4（H2O）14·2H2O] （H3pdc = 1H- pyrazole-3,5-dicarboxylic acid） has been synthesized and characterized by 1R spectra, elemental analysis, and single-crystal X-ray analysis. The crystal belongs to the monoclinic system, space group P2 1/c with a = 7.9521（18）, b = 12.251（3）, c = 22.293（5） A, β = 110.173（5）°, V= 2038.5（8） A^3, Mr = 1388.13, Z = 2, F（000） = 1352, Dc = 2.261 g/cm^3,/2 = 4.380 mm^-1, the final R = 0.0409 and wR = 0.0622 for 2453 observed reflections with I 〉 2σ（I）. The structural analysis shows that the Na^I, Cu^II and Gd^II ions are linked together by two kinds of bridging ligands （pdc^3- and H2O） to form a main moiety [Na2Cu2Gd2（pdc）4（H2O）14], which can be regarded as a centrosymmetric dimmer of [NaCuGd（pdc）2（H2O）7]. Many hydrogen bonds exist in the complex to build a 3D supramolecular framework.
The compound （SiCl3）2Fe（CO）4 was synthesized and structurally characterized by X-ray single-crystal diffraction. It crystallizes in monoclinic, space group P2 1/n with α = 8.287（2）, b = 9.829（2）, c = 9.042（2） A, β = 96.19（3）°, V= 732.2（3） A^3, C4Cl6FeO4Si2, Mr = 436.77, Z = 2, Dc = 1.981 g/cm^3, F（000） = 424, μ（MoKα） = 2.282 mm^-1, the final R = 0.048 and wR = 0.164 for 1109 observed reflections （I 〉 2σ（I））. The crystal structure of （SiCl3）2Fe（CO）4 reveals that the Si（l）- Fe-Si（l）^a sequence is linear and perpendicular to the Fe（CO）4 cross-shaped plane.
