Pyrimidyl-2-selenolates of cadmium and mercury: Synthesis, characterization, structures and their conversion to metal selenide nano-particles

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• 作者：Rakesh K. Sharma ; Amey Wadawale ; G. Kedarnath ; B. Vishwanadh ; Vimal K. Jain
• 关键词：Pyrimidyl selenolate ; Cadmium ; Mercury ; NMR ; Metal selenide nanoparticle
• 刊名：Inorganica Chimica Acta
• 出版年：24 February, 2014
• 年：2014
• 卷：411
• 期：Complete
• 页码：90-96
• 全文大小：1382 K

文摘

Reactions of [MCl₂(tmeda)] (M = Cd or Hg; tmeda = N,N,N鈥?em>,N鈥?tetramethylethylenediamine) with NaSeC₄H(R-4,6)₂N₂ (R = H or Me) gave selenolate complexes of the general formula [M{SeC₄H(R-4,6)₂N₂}₂(tmeda)_n] (M/R/n = Cd/H/1 (1); Cd/Me/1 (2); Hg/H/1 (3) and Hg/Me/0 (4)). The chloro complexes of general formula, [MCl{SeC₄H(Me-4,6)₂N₂}(tmeda)] (M = Cd (6) or Hg (7)) have been synthesized by redistribution reaction of [M{SeC₄H(Me-4,6)₂N₂}₂] with MCl₂ followed by treatment with tmeda. The complexes have been characterized by elemental analysis, UV-Vis and NMR (¹H, ¹³C, ⁷⁷Se, ¹¹³Cd and ¹⁹⁹Hg) spectroscopy. The molecular structures of [Cd{SeC₄H(Me-4,6)₂N₂}₂(tmeda)] and [Hg{SeC₄H(Me-4,6)₂N₂}₂] were established by single crystal X-ray diffraction. The complex, [Cd{SeC₄H(Me-4,6)₂N₂}₂(tmeda)] comprises of an octahedral cadmium atom containing chelating, two SeC₄H(4,6-Me)N₂ and one tmeda, ligands. The complex, [Hg{SeC₄H(Me-4,6)₂N₂}₂] has a linear structure with monodentate selenolate ligand. Thermolysis of [Cd{SeC₄H(Me-4,6)₂N₂}₂(tmeda)] and [Hg{SeC₄H(Me-4,6)₂N₂}₂] in various coordinating solvents afforded CdSe and HgSe nanoparticles which were characterized by UV-Vis, XRD, SEM, EDX and TEM.