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    • A simple coordination complex exhibiting colour change on slight structural modification: Synthesis and crystal structures of violet and yellow forms of [NiII(opda)2(NCS)2] (opda = orthophenylenediamine)

      Sabbani Supriya Samar K Das

      Volume 122 Issue 5 September 2010 pp 731-737

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/122/05/0731-0737

    • Keywords

       

      Orthophenylenediamine; nickel complexes; crystal structures; intricate hydrogen bonding networks.

    • Abstract

       

      The violet-coloured compound [NiII(opda)2(NCS)2] (1) undergoes colour change to strawyellow colour retaining its molecular composition on standing over long period of time at room temperature in the solid state. Compound 1 (violet form) and its yellow-form [NiII(opda)2(NCS)2] (2) (opda = orthophenylenediammine) have been characterized by routine spectroscopic methods and single crystal X-ray diffraction analysis. Compound 1 crystallizes in monoclinic space group $P2_1/c$ and its yellow form (compound 2) retains same space group. Their crystal structures show an intricate supramolecular network based on N-H$\cdots$S hydrogen bonds, that involve amine and thiocyanate groups coordinated to nickel(II).

    • Author Affiliations

       

      Sabbani Supriya1 Samar K Das1

      1. School of Chemistry, University of Hyderabad, Hyderabad 500 046

    • Dates

       
      Published
      September 2010

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