Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/98837
Type: Artigo de periódico
Title: The Shape Of The Refractive Index Versus Composition Curves For Hydrogen-bonded Liquid Mixtures
Author: Lin C.T.
Marques A.D.S.
Pessine F.B.T.
Guimaraes W.O.N.
Abstract: The dependence of volume fractions (%V) on the square of the refractive index (n2) has been determined for a series of intermolecular hydrogen-bonded systems. An additive linear relationship between %V and n2 is obtained for weakly hydrogen-bonded solutions of acetone and methanol while mixtures of acetone/water and methanol/water give a parabolic shape for the refractive-index diagrams. Surprisingly, a quasi-linearity (but with singular and turning points not apparent on the refractive-index curves) is found for strongly hydrogen-bonded cases such as 2,2,2-trifluoroethanol(TFE)/water, TFE/acetone, TFE/methanol, 1,1,1,3,3,3-hexafluoro-2-propanol (HFP)/water, HFP/acetone and HPP/methanol. This unexpected observation is explained in terms of the coexistence of various stable hydrogen-bonded species corresponding to different geometrical isomers and polymer complexes in the mixtures. The proposed explanation is confirmed by MENDO/3 molecular orbital calculations. © 1981.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/0022-2860(81)85058-2
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0006106936&partnerID=40&md5=8da966c05f6e527abd941e282c6c17da
Date Issue: 1981
Appears in Collections:Unicamp - Artigos e Outros Documentos

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