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J. Chim. Phys.
Volume 95, Number 10, November/December 1998
Page(s) 2199 - 2213
DOI: 10.1051/jcp:1998363

J. Chim. Phys. Vol. 95, N°10  p. 2199-2213

Is 2-naphthol isomorphous with 2-fluoronaphthalene or with naphthalene?

F. Michaud1, P. Negrier1, Y. Haget1, X. Alcobé2, M.A. Cuevas Diarte3 and H.A.J. Oonk4

1  Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798 du CNRS, Université Bordeaux I, 33405 Talence, France
2  Serveis Cientifico-Tècnics, Universitat de Barcelona, 08028 Barcelona, Spain
3  Departament de Cristallografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, 08028 Barcelona, Spain
4  Debye Institute, Department of Interfaces and Thermodynamics, Utrecht University, 3584 CH Utrecht, The Netherlands

y means of X-ray diffraction and thermal analysis on the systems 2-fluoro- naphthalene - 2-naphthol and naphthalene - 2-naphthol, it is shown that the form in which 2-naphthol crystallizes from the melt is identifiable with the typical form of naphthalene. Thus, there is second compound in the naphthalenic series for which this form proves to be more stable than the structurally bordering one preferred by 2- fluoronaphthalene and most of the simple $\beta$-substituted derivatives.

Une étude par diffraction des rayons X et analyse thermique des systèmes 2-fluoronaphtalène - 2-naphtol et naphtalène - 2-naphtol permet de montrer que la forme dans laquelle cristallise le 2-naphtol après fusion est identifiable à la forme type du naphtalène. Il existe donc un second composé au sein de la série naphtalénique pour lequel cette forme s'avère être plus stable que celle, structuralement voisine, adoptée par le 2-fluoronaphtalène et la plupart des dérivés $\beta$-substitués simples.

Key words: 2-R naphthalenes -- isomorphism -- mixed crystals -- phase diagrams

© EDP Sciences 1998

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