Versatile coordination environment and interplay of metal assisted secondary interactions in the organization of supramolecular motifs in new Hg(II)/PhHg(II) dithiolates
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- 作者：Gunjan Rajput ; Manoj Kumar Yadav ; Tejender S. Thakur ; Michael G.B. Drew ; Nanhai Singh
- 关键词：Dithiocarbamate ; Xanthate ; Trithioxanthate ; Photoluminescence ; Theoretical calculations
- 刊名：Polyhedron
- 出版年：17 February, 2014
- 年：2014
- 卷：69
- 期：Complete
- 页码：225-233
- 全文大小：1997 K
文摘
New mercury(II) complexes of the form [PhHg(L)] (L = L1 (1), L2 (2), L3鈥?(3), L4 = (4)); [Hg(L)2] (L = L5 (5), L4 (7) and [Hg2(L6)4] (6) have been synthesized and characterized by micro analysis and X-ray crystallography. Both 1 and 2 are linear; complex 2 revealed intramolecular Hg鈰疧 bonding interactions. Complex 3 possesses T-shaped geometry in a linear polymeric chain motif. Although serendipitously formed, 3 is the first example of a metal trithioxanthate complex. 4 is a typical dimer and in 5, a helical chain motif is generated via Hg鈰疭 contacts. 6 is a dinuclear complex with distorted square pyramidal geometry. 7 is mononuclear with a tetrahedrally coordinated mercury(II) ion. All complexes are luminescent in solution and solid state. In 2 the nature of Hg鈰疧 interactions have been assessed by DFT calculations and the electronic transitions in 3 have been corroborated by TDDFT calculations.