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Über Pterinchemie. 56. Mitteilung. Die Kristallstruktur von Xanthopterin‐hydrochlorid
Author(s) -
Bieri Jost H.,
Hummel WilliPeter,
Viscontini Max
Publication year - 1976
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19760590710
Subject(s) - chemistry , monoclinic crystal system , crystal structure , pyrazine , crystallography , molecule , protonation , crystal (programming language) , stereochemistry , organic chemistry , ion , computer science , programming language
The crystal structure of xanthopterine‐hydrochloride. The crystal structure of the title compound, a pterine, has been determined by X‐ray analysis (direct methods) and refined with 1332 structure amplitudes to R = 0.027. The crystal system is monoclinic, space group P 2 1/ c , with unit cell dimensions a = 7.942, b = 8.417, c = 12.076 Å, β = 93.77°. The molecule is protonated at the N(1)‐position. The angle between the planes of the pyrimidine and pyrazine rings is 2.02°.