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Die Struktur des Blattfarbstoffes Cordeauxia‐Chinon
Author(s) -
Fehlmann M.,
Niggli A.
Publication year - 1965
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.19650480207
Subject(s) - chemistry , tautomer , planarity testing , molecule , hydrogen bond , intermolecular force , stereochemistry , crystal structure , crystallography , organic chemistry
The crystal structure determination of cordeauxia‐quinone C 14 H 12 O 7 [1] (space group P 1) has settled the relative positions of the substituents at the naphthazarine skeleton. Furthermore, the bond lengths seem to favour the tautomeric form of formula IV. The acetyl and methoxyl groups deviate significantly from the planarity of naphthazarine; by intermolecular hydrogen bonds between hydroxyl and acetyl groups of adjacent molecules, infinite chains are formed.