Xantatos
Mostrando 1-2 de 2 artigos, teses e dissertações.
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1. Theoretical study of the internal elimination of xanthates using ONIOM additivity and pseudopotentials / Estudo teorico do mecanismo de eliminação interna de xantatos usando o metodo aditivo de energia atraves de ONIOM com pseudopotencial
The gas-phase internal elimination (Ei) reaction of xanthates and the decomposition of xanthic acid have been investigated using ONIOM Additivity Expression and Pseudopotential, ONIOM[CCSD(T)/CEP-311 (2d,f):MP2/CEP-31G//MP2/CEP-31G]. The higest leveI representation was calculated by means of CCSD(T)/CEP-31G and electronics and sterics effects by MP2/CEP-31G.
Publicado em: 2006
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2. Adsorção de xantatos sobre pirita
This paper presents a study of adsorption of xanthate with alkyl chain of two (C2XK), four (C4XK) and eight (C8XK) atoms of carbon, on pyrite from Santa Catarina, Brazil. The results showed that pyrite surface changes from hydrophilic to hydrophobic when xanthate is adsorbed increasing the contact angle to 35º for C2XK, and to 90º for C4XK and C8XK. The ra
Química Nova. Publicado em: 2001-10