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Type: Artigo de periódico
Title: Is statistical lack of fit a reliable criterion for chemical complexity?
Author: Bruns, RE
deAndrade, JC
Reis, C
Nakai, D
Abstract: Complexations of Fe-III and Co-II ions with thiocyanate in water-acetone-ethanol ternary mixtures are investigated using multivariate statistical techniques. Simplex lattice and hexagonal mixture designs lead to model equations resulting in similar conclusions. The Fe-III thiocyanate complex exhibits a very simple dependence (quadratic) on the ternary mixture composition. On the other hand this dependence is much more complex for the Co-II thiocyanate complex since even a full cubic mixture model shows a significant lack of fit at the 95% confidence level. These results indicate that the different possible symmetries of the Co-II complexes are more sensitive to the ternary mixture composition than are the multistep Fe-III complex equilibria.
Subject: mixture design
thiocyanate complexes
statistical modeling
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/0169-7439(96)00002-0
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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