首页> 外文期刊>Journal of Coordination Chemistry >Structural study of picolinamide complexes of Ni(II), Zn(II), Cd(II), and Hg(II) nitrates in solid state and solution
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Structural study of picolinamide complexes of Ni(II), Zn(II), Cd(II), and Hg(II) nitrates in solid state and solution

机译:Ni(II),Zn(II),Cd(II)和Hg(II)硝酸盐固态和溶液中吡啶甲酸酰胺配合物的结构研究

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Three picolinamide complexes of nickel(II) (1), zinc(II) (2), and cadmium(II) (3) have been prepared and their solid state structures were determined by single-crystal X-ray diffraction analysis. Their structures in DMSO solutions as well as the structure of similar mercury(II) complex, [Hg(NO3)(pia)2](NO3) (4), have been elucidated by 1H and 13C NMR spectra. The picolinamide is bound through the N,O-donors in all four complexes in solid state, but only in 4 it is in solution state. In nickel (1), zinc (2), and cadmium (3) complexes the pia-N coordination in solution is suggested. The X-ray analysis revealed that isomorphous nickel (1) and zinc (2) crystal structures comprise the centrosymmetrical trans-[M(H2O)2(pia)2]2+ (M = Ni, Zn; pia = picolinamide) and nitrate. The crystal lattices also contain two non-coordinated H2O molecules. In 3, each cadmium(II) is N,O-chelated by two cis-oriented pia ligands, while remaining coordination sites of the capped pentagonal bipyramid are occupied by three oxygen atoms from two nitrates. Crystal structures are dominated by O/N/C-H···O hydrogen bonds. The carboxamide moieties in 1 and 2 do not form any head-to-head or catemeric supramolecular synthons, but participate in the formation of (12) motifs with solely the amide nitrogen atoms as double hydrogen bond donors. In 3, neighboring molecules are linked into head-to-head amide dimers. The biological effect of picolinamide and [Zn(pia)2(H2O)2](NO3)2 on ingestion and intracellular microbicidal capacities of human peripheral blood phagocytes was also assessed.View full textDownload full textKeywordsPicolinamide complexes, NMR, Crystal structure, Hydrogen bonding, PhagocytosisRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00958972.2012.663912
机译:制备了镍(II)(1),锌(II)(2)和镉(II)(3)的三种吡啶啉配合物,并通过单晶X射线衍射分析确定了它们的固态结构。它们在DMSO溶液中的结构以及类似的汞(II)配合物[Hg(NO 3 )(pia) 2 ](NO 3 < / sub>)(4),已通过 1 H和 13 C NMR光谱进行了阐明。吡啶甲酰胺在所有四个复合物中均以固相通过N,O-供体结合,但只有4个处于溶液状态。建议在镍(1),锌(2)和镉(3)配合物中使用pia-N配位溶液。 X射线分析表明,同构的镍(1)和锌(2)晶体结构包含中心对称的反式[M(H 2 O) 2 (pia)< sub> 2 ] 2 + (M = Ni,Zn; pia = picolinamide)和硝酸盐。晶格还包含两个非配位的H 2 O分子。在图3中,每个镉(II)被两个顺式pia配体N,O螯合,而封端的五角双锥体的其余配位点则被来自两个硝酸盐的三个氧原子占据。晶体结构由O / N / C-H···O氢键为主。 1和2中的羧酰胺基团不形成任何头对头或邻位的超分子合成子,但仅以酰胺氮原子作为双氢键供体参与(12)基序的形成。在图3中,相邻分子连接成头对头酰胺二聚体。吡啶甲酰胺和[Zn(pia) 2 (H 2 O) 2 ](NO 3 2 对人体外周血吞噬细胞的摄入和细胞内杀微生物能力也进行了评估。在线”,services_compact:“ citeulike,netvibes,twitter,technorati,可口,linkedin,facebook,stumbleupon,digg,google,更多”,发布号:“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/00958972.2012.663912

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