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Structures cristallines des derives 2 et 2,3 de la naphtoquinone-1,4. VIII. Structure de la dibromo-2,3-naphtoquinone-1,4

Structures cristallines des derives 2 et 2,3 de la naphtoquinone-1,4. VIII. Structure de la dibromo-2,3-naphtoquinone-1,4

Abstract

<h2>Acta Crystallographica</h2><h3></h3><h3>0365-110X</h3> <h2>research papers</h2> Volume 23 Part 6 Pages 1031-1037 December 1967 <h2>Structures cristallines des dérivés 2 et 2,3 de la naphtoquinone-1,4. VIII. Structure de la dibromo-2,3-naphtoquinone-1,4</h2> M. Breton-Lacombe Acta Cryst. (1967). 23, 1031 Structures Cristallines des D6riv6s 2 et 2,3 de la Naphtoquinone-l,4 VIII. Structure de la Dibromo-2,3-naphtoquinone-l,4 PAR M. BRETON-LACOMBE Laboratoire de Mindralogie et Crtallographie de la Facultd des Sciences de Bordeaux, associd au C.N.R.S., France (Regu le 11 mai 1967) Crystals of 2,3-dibromo-l,4-naphthoquinone, C1002Br2H4, are orthorhombic, space group Pca21, with 4 molecules in a unit cell of dimensions a= 15.17, b=3.97, c= 15.83 A. The structure has been refined by the least-squares method. C-Br... O bonding stabilizes the structure. La dibromo-2,3-naphtoquinone-l,4 a 6t6 cristallis6e par 6vaporation lente d'une solution dans l'acide ac6- tique. Les cristaux obtenus sont prismatiques, de forme allong6e. Le groupe spatial et les dimensions de la maille ont 6t6 obtenus respectivement sur diagramme de De Jong et de Bragg avec la radiation Cu K~, l'axe de rotation 6tant choisi suivant la direction d'allonge- ment b du cristal. Donn~es exp~rimentales Dibromo-2,3-naphtoquinone- 1,4: CloO2Br2H4 (P. F. = 220 o) Syst~me orthorhombique" a = 15,17 + 0,03 b = 3,97 + 0,02 c = 15,83
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