NDLI: The influence of counter ion and ligand methyl substitution on the solid-state structures and photophysical properties of mercury(II) complexes with (E)-N-(pyridin-2-ylmethylidene)arylamines

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mitra, Sivaprasad Basu Baul, Tushar S. Tiekink, Edward R. T. Höpfl, Herbert Linden, Anthony Kundu, Sajal
Description	Author Affiliation: Basu Baul TS ( Department of Chemistry, North-Eastern Hill University, NEHU Permanent Campus, Umshing, Shillong 793 022, India. basubaul@nehu.ac.in)
Abstract	Ten neutral monomeric, dimeric and polymeric mercury(II) complexes of compositions $HgX_{2}L$ (3, 8), $[HgX_{2}L]_{2}$ (1, 2, 4–6 and 7), $[Hg(NO_{3})_{2}L]_{n}$ (9) and $\{[Hg(N_{3})_{2}L]_{2}\}_{n}$ (10) where X = chloride, bromide, iodide, nitrate and azide, and L = (E)-N-(pyridin-2-ylmethylidene)arylamine, are described. Compounds 1–10 were characterized by elemental analyses, and IR and $^{1}H$ NMR spectroscopic studies. The solution-state photophysical properties of the complexes are highly dependent on the anions as seen in the fluorescence emission features. Single-crystal X-ray crystallography showed that the molecular complexes can aggregate into larger entities depending upon the anion coordinated to the metal centre. Iodide gives discrete monomeric complexes, chloride and bromide generate binuclear complexes formed through Hg–X–Hg bridges, while nitrate and azide lead to 1D coordination polymers . The significant differences in the observed aggregation patterns of the compounds indicate that the anions exert a substantial influence on the formation of the compounds. A further influence upon supramolecular aggregation is the presence of methyl substituents in $L^{3}$ and $L^{4},$ which generally enhances the probability of forming supramolecular π⋯π interactions involving the five-membered $C_{2}N_{2}Hg$ chelate rings in their crystal structures.
ISSN	14779226
Issue Number	5
Volume Number	42
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-02-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Amines Chemistry Coordination Complexes Mercury Pyridines Chemical Synthesis Crystallography, X-Ray Ions Ligands Molecular Conformation Quantum Theory Stereoisomerism Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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