L-cysteine-I at 30 K

S A Moggach, S J Clark, S Parsons

Research output: Contribution to journalArticlepeer-review

Abstract

The crystal structure of the orthorhombic phase I of L-cysteine, C3H7NO2S, has been determined at 30 K. The molecule adopts a gauche(+) conformation and the structure consists of zwitterions connected into sinusoidal layers by N H H (. . .) O hydrogen bonds. Further N - H (. . .) O hydrogen bonds connect the structure into a three-dimensional array. Under ambient conditions, the thiol H atom is disordered in such a way as to form intermolecular S - H (. . .) S and S - H (. . .) O hydrogen bonds. At 30 K the structure is ordered with retention of the S - H (. . .) S contacts [S (. . .) S = 3.8489 (4) angstrom, S - H (. . .) S = 2.66 (3) angstrom and S - H (. . .) S = 150.8 (16)degrees].

Original languageEnglish
Pages (from-to)O2739-O2742
Number of pages4
JournalActa Crystallographica Section E: Structure Reports Online
Volume61
DOIs
Publication statusPublished - Aug 2005

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