Mixed salts of amino acids: L-histidinium(+) L-histidinium(2+) nitrate-hexafluorosilicate
- Author(s)
- V. V. Ghazaryan, Michel Fleck, A.M. Petrosyan
- Abstract
Single crystals of the mixed salt L-histidinium(+) L-histidinium(2+) nitrate-hexafluorosilicate have been obtained from aqueous solution and characterized structurally and by infrared and Raman spectroscopy. The title salt crystallizes in the monoclinic system (space group P21, Z = 2). The asymmetric unit contains L-histidinium(+) and L-histidinium(2+) cations as well as nitrate and hexafluorosilicate anions. L-histidinium(+) and L-histidinium(2+) cations form short hydrogen bond with an O?O distance equal to 2.507(2) Å, thus forming a (L-His+L-His+) dimeric cation, therefore the formula is correctly given as View the MathML source. This is the first observation of the (L-His+L-His+) dimeric cation. The presence of the O-HO hydrogen bond of the (L-His+L-His2+) dimeric cation is reflected in the infrared spectrum as a broad absorption band centered at ca. 1300 cm-1 caused by stretching vibration of O-H bond.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- National Academy of Sciences of the Republic of Armenia
- Journal
- Journal of Molecular Structure
- Volume
- 1026
- Pages
- 140-144
- No. of pages
- 5
- ISSN
- 0022-2860
- DOI
- https://doi.org/10.1016/j.molstruc.2012.05.052
- Publication date
- 2012
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105113 Crystallography, 104015 Organic chemistry
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/67c3639c-1698-4c41-bb46-c567796ed810