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  • Title: L-tryptophan L-tryptophanium chloride.
    Author: Ghazaryan VV, Fleck M, Petrosyan AM.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2015 Feb 05; 136 Pt B():743-50. PubMed ID: 25448973.
    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.
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