New crystals of L-histidine maleates
- Autor(en)
- Michel Fleck, V. V. Ghazaryan, L.S. Bezhanova, A. K. Atanesyan, A.M. Petrosyan
- Abstrakt
Two new crystals were obtained in the system L-histidine (L-His) + maleic acid + H2O: L-His+maleateH2O (I) and L-His2+2maleate (II) in addition to two previously known species: L-His+maleate (III)and 2L-His+2maleate3H2O (IV). Crystal structures and vibrational spectra of (I) and (II) are determinedand compared with structures of (III) and (IV). L-His+maleateH2O is monoclinic (space group P21, Z = 2),L-His2+2maleate is triclinic (space group P1, Z = 2). The conformation of the histidine molecules in (I) isclosed - as it was found in (III) - whereas in (II) all molecules are in open conformation. Moreover, it isshown that in the structure published for (IV), extremely short CAH O type hydrogen bonds areincluded, which along with several other data indicate that in this structure N and C atoms in imidazolegroup of one L-His+ cation have been confused.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- National Academy of Sciences of the Republic of Armenia
- Journal
- Journal of Molecular Structure
- Band
- 1035
- Seiten
- 407-415
- Anzahl der Seiten
- 9
- ISSN
- 0022-2860
- Publikationsdatum
- 2013
- Peer-reviewed
- Ja
- ÖFOS 2012
- 104017 Physikalische Chemie, 105113 Kristallographie, 104015 Organische Chemie
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/6b1acf9e-0fa6-4669-b162-18444547aff3