Mercury(II) complexes of stabilized phosphine-phosphonium ylide derived from bis(diphenylphosphino)methane: Synthesis, spectra and crystal structures期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Mercury(II) complexes of stabilized phosphine-phosphonium ylide derived from bis(diphenylphosphino)methane: Synthesis, spectra and crystal structures

Authors:	Mothi Mohamed Ebrahim Krishnaswamy Panchanatheswaran Antonia Neels

Institution:	^a School of Chemistry, Bharathidasan University, Tiruchirappalli, India ^b Institute of Microtechnology, University of Neuchâtel, Neuchâtel, Switzerland

Abstract:	The reaction of a mixed phosphine-phosphonium ylide, PPh₂CH₂PPh₂C(H)C(O)Ph with mercury(II) halides in methanol under mild conditions yielded the P, C-chelated complexes, HgX₂(PPh₂CH₂PPh₂C(H)C(O)Ph)] where X = Cl (2), Br (3), I (4). Single crystal X-ray diffraction studies reveal the presence of mononuclear complexes containing Hg atom in a distorted tetrahedral environment and long Hg-C_ylide bond. The five-membered chelate rings in the two independent molecules present in the asymmetric unit of 4 adopt ‘envelope’ and ‘twist’ conformations. Spectroscopic studies also indicate the weaker Hg-C bonding. Additionally, the molecular structure of the free ylide (1) is also discussed.

Keywords:	Phosphorus ylides Resonance stabilization Mecury(II) complexes
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