title: L-tryptophan L-tryptophanium chloride.
abstract: L-tryptophan L-tryptophanium chloride is a new salt with (A⋯A(+)) type dimeric cation. It crystallizes in the monoclinic system (space group P2(1), Z=2). The asymmetric unit contains one zwitterionic L-tryptophan molecule, one L-tryptophanium cation and one chloride anion. The dimeric cation is formed by a O-H⋯O hydrogen bond with the O⋯O distance equal to 2.5556(18) Å. The infrared and Raman spectra of the crystal are studied and compared with the spectra of L-tryptophanium chloride.
authors.affiliation: Institute of Applied Problems of Physics, NAS of Armenia, 25 Nersessyan Str., 0014 Yerevan, Armenia.
authors.forename: V V
authors.initials: VV
authors.lastname: Ghazaryan
authors.affiliation: Institute of Mineralogy and Crystallography, University of Vienna, Althanstr. 14, A-1090 Vienna, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Fleck
authors.affiliation: Institute of Applied Problems of Physics, NAS of Armenia, 25 Nersessyan Str., 0014 Yerevan, Armenia. Electronic address: aram.m.petrosyan@gmail.com.
authors.forename: A M
authors.initials: AM
authors.lastname: Petrosyan
mesh_terms: D002412:Cations / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry*; D018360:Crystallography, X-Ray; D019281:Dimerization; D006860:Hydrogen Bonding; D008958:Models, Molecular; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014364:Tryptophan / Q000031:analogs & derivatives*
chemical_list: D002412:Cations; D002712:Chlorides; D014364:Tryptophan
keywords: Dimeric cation; Structure; Vibrational spectra; l-Tryptophan l-tryptophanium chloride