Abstract
l-Tryptophan l-tryptophanium chloride is a new salt with (A⋯A+) type dimeric cation. It crystallizes in the monoclinic system (space group P21, 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 OH⋯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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