Arylazoimidazoliumchloride and chlorometallates: Spectroscopic and structural characterization

作者：Halder S; Saha G; Chand B G; Jana A D; Mostafa G; Cheng J; Lu T H; Sinha C^*

来源：Inorganica Chimica Acta, 2010, 363(10): 2080-2088.

DOI：10.1016/j.ica.2010.02.006

• Aryl-azo-imidazolium chloride
• Chlorometallated azoimidazolium
• X-ray structures
• Tapelike aquated-chloride
• Ladder

Protonation or dialkylation of 2-(arylazo)imidazoles (RaaiH) has generated azoimidazolium motif (RaaiH(2)(+), RaaiR'H+, RaaiR(2)'(+) where R = H, CH3 and R' = Me, Et, -CH2Ph). Electrostatic attraction between imdazolium cation and counter ions like Cl, ZnCl42-, PtCl62- has generated hydrogen bonded azoimidazolium-chloride/chlorometallated networks. The single crystal X-ray structure of 1-benzyl-2-(phenylazo) imidazolium chloride shows tape like 1-D network of [Cl(H2O)(4)]. Aquated Cl forms 10 membered supracycle through hydrogen bonding with imidazolium ion. The X-ray structures of [HaaiMe(2) (1,3)](+)[Me2NH2](+) [ZnCl4](2) and [MeaaiH(2)(+)center dot H2O](2)[PtCl6](2) show hydrogen bonded chlorometallate chain penetrated into the channel developed by organic motif. Azoimidazolium units are associated through pi center dot center dot center dot pi and C-H center dot center dot center dot pi interactions to strengthen the supramolecular geometry.

• 出版日期2010-6-20
• 单位清华大学