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

作者：Supriya Sabbani; Das Samar K^*

来源：Journal of Chemical Sciences, 2010, 122(5): 731-737.

DOI：10.1007/s12039-010-0061-4

• Orthophenylenediamine
• nickel complexes
• crystal structures
• intricate hydrogen bonding networks

The violet-coloured compound [Ni-II(opda)(2)(NCS)(2)] (1) undergoes colour change to straw-yellow 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 [Ni-II(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 center dot center dot center dot S hydrogen bonds, that involve amine and thiocyanate groups coordinated to nickel(II).

• 出版日期2010-9