尾-Alaninium picrate: A new salt with di-尾-alaninium dimeric cation

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• 作者：M. Fleck^a ; V.V. Ghazaryan^b ; A.M. Petrosyan^b ; ^{apetros@iapp.sci.am}
• 关键词：尾-Alaninium picrate ; Dimeric cation ; Structure ; Vibrational spectra
• 刊名：Journal of Molecular Structure
• 出版年：2012
• 期刊代码：62_00222860
• 类别：ch
• 出版时间：18 July, 2012
• 卷：1019
• 期：Complete
• 页码：91-96
• 文件大小：626 K

摘要

尾-Alaninium picrate crystallizes in the form of yellow columns, in the triclinic system (space group P, Z = 2). The asymmetric unit contains one 尾-alaninium cation and one picrate anion. Nevertheless, the unit cell comprises a dimeric centrosymmetric 尾-Ala⁺鈰?em>尾-Ala⁺ cation and two picrate anions. The O鈰疧 distance (2.636(2) 脜) in the dimeric cation is among the shortest distances of known salts with A⁺鈰疉⁺ type dimeric cations. The infrared and Raman spectra are shown and discussed. A comparison of known crystals with 尾-Ala⁺鈰?em>尾-Ala⁺ cations is presented, which shows that four different types can be distinguished.