Ghazaryan V V, Zakharov B A, Boldyreva E V, Petrosyan A M
Institute of Applied Problems of Physics, NAS of Armenia, 25 Nersessyan Str., 0014 Yerevan, Armenia.
Institute of Solid State Chemistry, Siberian Branch of the Russian Academy of Sciences, Kutateladze 18, Novosibirsk 630128, Russian Federation; REC-008, Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russian Federation.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 May 5;142:344-9. doi: 10.1016/j.saa.2015.02.036. Epub 2015 Feb 14.
Single crystals of l-methioninium picrate were obtained by evaporation of aqueous solution containing equimolar quantities of each component. l-Methioninium picrate crystallizes in the monoclinic system (space group P21, Z=2). The asymmetric unit contains one l-methioninium cation and one picrate anion. The carboxyl group of the cation forms an O-H⋯O hydrogen bond with the phenoxy oxygen atom and has an O⋯O distance of 2.669(3)Å. The protonated amino group of the l-methioninium cation forms N-H⋯O hydrogen bonds with the phenoxy oxygen atom of the picrate anion and the carbonyl oxygen atom of the symmetry related cation. The infrared and Raman spectra are recorded and discussed.
通过蒸发含有等摩尔量各组分的水溶液，获得了苦味酸L-甲硫氨酸单晶。苦味酸L-甲硫氨酸在单斜晶系中结晶（空间群P21，Z = 2）。不对称单元包含一个L-甲硫氨酸阳离子和一个苦味酸根阴离子。阳离子的羧基与苯氧基氧原子形成O-H⋯O氢键，O⋯O距离为2.669(3)Å。L-甲硫氨酸阳离子的质子化氨基与苦味酸根阴离子的苯氧基氧原子和对称相关阳离子的羰基氧原子形成N-H⋯O氢键。记录并讨论了红外光谱和拉曼光谱。
