Mixed salts of amino acids with different anions

Mixed salts of amino acids with different anions are of considerable interest from chemical and structural points of view and also as a source of new materials the properties of which can be controlled by appropriate choice of anions. Four such crystals, L-His2+·Cl−·HSO4− (P212121, Z=4), L-Arg2+·NO3...

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Bibliographic Details
Published in:Journal of crystal growth Vol. 362; pp. 182 - 188
Main Authors: Ghazaryan, V.V., Fleck, M., Petrosyan, A.M.
Format: Journal Article Conference Proceeding
Language:English
Published: Amsterdam Elsevier B.V 01.01.2013
Elsevier
Subjects:
A2. Growth from solutions
Amino acids
Anions
B1. Amino acids' mixed salts
Carboxyl group
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science; rheology
Crystal growth
Crystal structure
Exact sciences and technology
Fluorides
Growth from solutions
Hydrogen bonds
Infrared radiation
Materials science
Methods of crystal growth; physics of crystal growth
Organic compounds
Physics
Structure of solids and liquids; crystallography
Structure of specific crystalline solids
B1. Amino acids' mixed salts
A2. Growth from solutions
Crystal growth
Hydrogen bonds
Hafnium
Amino acids
Fluorides
Infrared spectra
Raman spectroscopy
Growth from solution
ISSN:0022-0248, 1873-5002
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Summary:Mixed salts of amino acids with different anions are of considerable interest from chemical and structural points of view and also as a source of new materials the properties of which can be controlled by appropriate choice of anions. Four such crystals, L-His2+·Cl−·HSO4− (P212121, Z=4), L-Arg2+·NO3−·ClO4− (δ-form, P21, Z=4), L-Arg2+·F−·NO3− (P1, Z=2), 2L-Arg2+·(F−⋯HF)·3NO3− (P212121, Z=4), have been characterized structurally and by IR and Raman spectra. The hydrogen bond between the carboxyl group and the fluoride ion (2.371(3)Å) in the structure of L-Arg2+·F−·NO3− is among the shortest known O–H⋯F type hydrogen bonds. The O–H⋯F hydrogen bond in the structure of 2L-Arg2+·(F−⋯HF)·3NO3− is even shorter (2.341(2)Å) and thus belongs to the shortest contacts among both Ο–Η⋯F and F–H⋯O types hydrogen bonds. ► Four crystalline amino acid salts with different anions have been obtained. ► Molecular and crystal structures were determined by XRD and vibrational spectroscopy. ► Very short O⋯F type H-bonds were found, two shorter than any previously known.
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ISSN:0022-0248
1873-5002
DOI:10.1016/j.jcrysgro.2011.09.059