کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1408679 | 1501689 | 2017 | 7 صفحه PDF | دانلود رایگان |
• A rare anionic copper complex (2-Methylimidazolium)[copper(II)(pentafluorobenzoate)4] was synthesized.
• Various complementary techniques including single crystal X-ray investigation were used for characterization.
• Unexpected square planar geometry of copper(II) coordinated with four carboxylates was observed.
• Multitude of non-covalent interactions were identified to stabilize crystal lattice.
A new anionic copper(II) complex, (MeImH)2 [Cu(pfbz)4] (1) where, MeImH = 2-methylimidazolium and pfbz = pentafluorobenzoate has been isolated by reacting copper(II) sulfate pentahydrate, pentafluorobenzoic acid and 2-methylimidazole in ethanol: water mixture in 1:2:2 molar ratio. This complex 1 has been characterized by elemental analysis, thermogravimetric analysis, spectroscopic techniques (UV-Vis, FT-IR) and conductance measurements. The complex salt crystallizes in monoclinic crystal system with space group C2/c. Single crystal X-ray structure determination revealed the presence of discrete ions: [Cu(pfbz)4]2- anion and two 2-methylimidazolium cation (C4H7N2)+. The crystal lattice is stabilized by strong hydrogen bonding and F⋯F interactions between cationic-anionic and the anionic-anionic moieties respectively, besides π-π interactions.
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Journal: Journal of Molecular Structure - Volume 1128, 15 January 2017, Pages 135–141