Synthesis of a mononuclear oxidovanadium(V) complex by bridge-splitting of the corresponding binuclear precursor
摘要:
The mononuclear oxidovanadium(V) complex VO(OEt)L (2), where L2- is the dianion of a diprotic tridentate ONO donor ligand, 2-hydroxyacetophenone-2-aminobenzoylhydrazone (H2L), has been synthesized by oxido-bridge splitting of the corresponding binuclear complex V2O3L2 (1) and structurally characterized by single crystal X-ray diffraction analysis, together with electrochemical and spectral studies. Splitting of the oxido-bridge was effected by refluxing 1 with excess triphenylphosphine in ethanol medium. The crystal structure of 2 is compared with that of the precursor binuclear complex 1. (C) 2012 Elsevier B.V. All rights reserved.
Syntheses and structural investigation of some alkali metal ion-mediated LVVO2− (L2− = tridentate ONO ligands) species: DNA binding, photo-induced DNA cleavage and cytotoxic activities
作者:Subhashree P. Dash、Alok K. Panda、Sagarika Pasayat、Rupam Dinda、Ashis Biswas、Edward R. T. Tiekink、Yogesh P. Patil、M. Nethaji、Werner Kaminsky、Subhadip Mukhopadhyay、Sujit K. Bhutia
DOI:10.1039/c4dt00883a
日期:——
104 M−1. Complexes 1–8 were also tested for DNA nuclease activity against pUC19 plasmid DNA which showed that 6 and 7 had the best DNA binding and photonuclease activity; these results support their good protein binding and cleavage activity with binding constants ranging from 104 to 105 M−1. Finally, the in vitro antiproliferative activity of all complexes was assayed against the HeLa cell line. Some
八个碱金属离子介导的双氧钒(V),[V V O 2 L 1-6 } A(H 2 O)n ] ∝,A = Li +,Na +,K +和Cs +的配合物,含三齿描述了通过ONO供体原子配位的芳酰肼磺酸酯配体。通过元素分析,IR,UV-Vis和NMR光谱法成功地表征了所有合成的配体和金属配合物。的X射线晶体学调查3,5-7示出的存在扭曲NO 4对于LVO协调的几何形状2 -在每种情况下,与变化的μ-氧桥和/或μ-AQUA与该碱金属离子的大小相关有趣的变化桥接:与小栗+,没有桥接-O被发现而是四个离子聚集体被发现与Na +,链为K +,最后为Cs +层。两个(5)或三维(3,6和7)架构通过氢键固结。发现dioxidovanadium(V)配合物表现出DNA结合活性,这是由于它们通过凹槽结合模式与CT-DNA相互作用,结合常数范围为10。3至10 4 M -1。还测试了复合物1–8对pUC19质
Synthesis, characterization, and cytotoxic and antimicrobial activities of mixed-ligand hydrazone complexes of variable valence VO<sup>z+</sup> (<i>z</i> = 2, 3)
作者:Nirmalendu Biswas、Sachinath Bera、Nayim Sepay、Titas Kumar Mukhopadhyay、Krishnendu Acharya、Sandipta Ghosh、Swarnali Acharyya、Anup Kumar Biswas、Michael G. B. Drew、Tapas Ghosh
DOI:10.1039/c9nj04171k
日期:——
susceptibility measurements and by various spectroscopic techniques. The structures of complexes 2, 5 and 8 have been determined by single crystal X-ray diffractometry. This study indicates that the co-ligands have remarkable effect on the selective stabilization of the oxidation state of vanadium because the neutral N, N donor phen ligand stabilizes the +IV state while the monobasic O-, N donor hq- ligand
A Study of Anti-inflammatory and Analgesic Activity of New 2,3-Disubstituted 1,2-Dihydroquinazolin-4(3H)-one Derivative and Its Transition Metal Complexes
non-electrolytic nature of complexes. IR spectral analysis reveal that coordination takes place through the deprotonated hydroxyl group, azomethine nitrogen and carbonyl oxygen. Four coordinated geometry was assigned to all the complexes on the basis of spectral studies. The anti-inflammatoryactivities of compounds are moderate. Co(II) complex exhibited highest activity among all the complexes. At lower dose
Synthesis, characterization, anti-inflammatory and analgesic activity of transition metal complexes of 3-[1-(2-hydroxyphenyl) ethylideamino]-2-phenyl-3,4-dihydroquinazolin-4(3H)-one
作者:Rekha S. Hunoor、Basavaraj R. Patil、Dayananda S. Badiger、Ramesh S. Vadavi、Kalagouda B. Gudasi、V. M. Chandrashekhar、I. S. Muchchandi
DOI:10.1002/aoc.1790
日期:2011.6
[M(HEPDQ)Cl] for all the complexes. A four‐coordinate geometry was assigned to all the complexes. The complexes along with the parent ligand were screened for their anti‐inflammatory activity, using carrageenan‐induced rat paw edema, and for their analgesicactivity by Eddy's hot plate method. The activity of the ligand was enhanced on complexation with metal ions. This enhanced activity was attributed to
Synthesis, Structure, and Reactivity of a New Mononuclear Molybdenum(
<scp>VI</scp>
) Complex Resembling the Active Center of Molybdenum Oxotransferases
作者:Rupam Dinda、Parbati Sengupta、Saktiprosad Ghosh、William S. Sheldrick
DOI:10.1002/ejic.200390049
日期:2003.1
synthesis, and structure determination of a pentacoordinate square-pyramidal molybdenum(VI) complex MoO2L (where LH2 is a diacidic tridentate ONO donor ligand) is reported. The substrate binding capacity of MoO2L has been demonstrated by the formation and isolation of six-coordinate octahedral complexes [MoO2L(B)] (where B = imidazole, 1-methylimidazole, pyridine, or γ-picoline) and the structures of [MoO2L(Imz)]