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      https://www.ias.ac.in/article/fulltext/jcsc/130/11/0157

    • Keywords

       

      Halidomercury(II); chlorido/bromido bridge; bidentate (N, O) chelator; X-ray structure; luminescence.

    • Abstract

       

      A neutral coordination polymer of chloridomercury(II) of the type[Hg(bzpy).μ−Cl/Cl]n (1) and a dinuclear complex of bromidomercury(II) of the type [Hg(bzpy).μ − Br/ Br]2 (2) (bzpy = 2-benzoylpyridine) were synthesized using a 1:1 molar ratio of HgCl2/HgBr2 and bzpy in methanolic solvent at room temperature and X-ray crystallographically characterized. Structural analyses show that each mercury(II) center in both the compounds adopts a distorted square pyramidal geometry with an HgNOX3 [X = Cl in 1 and X = Br in 2] chromophore. Each mercury(II) center in the coordination polymer 1 is connected to two other metal(II) centers through two different chlorido bridges affording a zigzag one-dimensional (1D) chain. In the crystalline state, 1D chains in 1 are stabilized through weak non-covalent C−H···π interactions promoting to a 2D sheet structure,and these 2D sheets, in turn, are further associated through intermolecular C−H···O hydrogen bonds resulting in a 3D network structure. In 2, two bromide ions bridge two metal(II) centers to form a dinuclear entity. Thedinuclear units in 2 are packed through π · ·π stacking and intermolecular C−H · ·O hydrogen bonds to afford a 2D sheet structure. These 2D sheets self-assemble through intermolecular C−H···Br hydrogen bonds promoting to a 3D network structure. The thermally stable compounds 1 and 2 exhibit intraligand 1

      1(π−π*)/fluorescence in DMF solutions at room temperature

    • Author Affiliations

       

      DIPU SUTRADHAR1 HABIBAR CHOWDHURY2 NIMAI CHANDRA SAHA3 BARINDRA KUMAR GHOSH1

      1. Department of Chemistry, The University of Burdwan, Burdwan, West Bengal 713104, India
      2. Department of Chemistry, Kabi Nazrul College, Murarai, Birbhum, West Bengal 731219, India
      3. Vice-Chancellor’s Research Group, Department of Zoology, The University of Burdwan, Burdwan, West Bengal 713104, India
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  • Journal of Chemical Sciences | News

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