Crystal structure and characterization of mcaps">l-arginine chlorate and mcaps">l-arginine bromate

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• 作者：A.M. Petrosyan ; H.A. Karapetyan ; R.P. Sukiasyan ; A.E. Aghajanyan ; V.G. Morgunov ; E.A. Kravchenko and A.A. Bush
• 关键词：mCaps">l-Arginine chlorate ; Bromate ; Crystal structure ; Solution growth ; Properties
• 刊名：Journal of Molecular Structure
• 出版年：2005
• 期刊代码：62_00222860
• 类别：ch
• 出版时间：2005
• 卷：752
• 期：1-3
• 页码：144-152
• 文件大小：377 K

摘要

The salts l-arginine.HClO₃ and l-arginine.HBrO₃, were synthesized. The crystals obtained were characterized by IR and NQR spectroscopy, thermal analysis, Nd:YAG laser radiation second harmonic generation, dielectric, piezoelectric and pyroelectric measurements and their crystal structures were determined. l-arginine.HClO₃ and l-arginine.HBrO₃ are crystallized in orthorhombic (space group P2₁2₁2₁) and triclinic (space group P1) systems, respectively. Their structures consist of the protonated arginine cation [⁺(H₂N)₂CNH(CH₂)₃CH(NH₃⁺)COO⁻] and respective ClO₃⁻ or BrO₃⁻ anions. Hydrogen bonds (stronger in the bromate) connect anions with cations and the latter with each other. However, these salts have essential distinctions in crystal packing.