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      https://www.ias.ac.in/article/fulltext/jcsc/127/08/1397-1404

    • Keywords

       

      Nickel(II); imidazol-2-ylidene-N'-phenylurea; hexa-coordination; chelating ligands; hydrogen bonding.

    • Abstract

       

      We report the syntheses and structural studies of two nickel(II) complexes of imidazol-2-ylidene- N'-phenylureate ligand of composition [{Im𝑡Bu NCON(H)Ph}2 Ni(acac)2] (1) and [(C6H5NH2)2 Ni(acac)2] [ImMes NCON(H)Ph] (2). The nickel complex 1 was readily prepared by the reaction of nickel(II) acetylacetonate [Ni(acac) 2 ] with imidazol-2-ylidene-N'-phenylureate ligand [Im𝑡Bu NCON(H)Ph] (L1) in THF under reflux condition for 72 h. The nickel complex 2 was obtained by the reaction of [Ni(acac)2], mesityl derivative of imidazol-2-ylidene-N′-phenylureate ligand [ImMes NCON(H)Ph] (L2) in the presence of aniline as base under reflux condition in THF. Both the paramagnetic complexes have been characterized by FT-IR spectroscopy and elemental analyses. Solid-state structures of both the new complexes were established by single crystal X-ray diffraction analysis. In the molecular structures of complexes 1 and 2, each nickel(II) ion is six fold coordinated and form a distorted octahedral geometry. The optical properties of both complexes have been explored. The Hirshfeld surfaces are used to view and analyze the intermolecular contacts in crystalline state for complex 2.

    • Author Affiliations

       

      Kishor Naktode1 Abhinanda Kundu1 Sudeshna Saha2 Hari Pada Nayek2 Tarun K Panda1

      1. Department of Chemistry, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yeddumailaram 502 205, Telangana, India
      2. Department of Applied Chemistry, Indian School of Mines, Dhanbad, 826 004, Jharkhand, India
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