Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/58074
Type: Artigo de periódico
Title: THERMOCHEMICAL STUDY OF ADDUCTS OF TETRAMETHYLTHIOUREA WITH ANTIMONY AND BISMUTH TRIIODIDES
Author: DOSSANTOS, LCR
DEOLIVEIRA, SF
ESPINOLA, JGP
AIROLDI, C
Abstract: The adducts MI3.tmtu (M = Sb, Bi; tmtu = tetramethylthiourea) were prepared, characterized and studied through reaction-solution calorimetry at 298.15 K. The molar standard enthalpy DELTA(R)H(m)empty set of the reaction MI3(cr)+tmtu(cr)=MI3.tmtu(cr) gave -19.84 +/- 0.46 and -13.01 +/- 0.17 kJ mol-1 for Sb and Bi, respectively. From DELTA(r)H(m)empty set values the standard molar enthalpies of formation of the crystalline Sb and Bi adducts were calculated as -158.5 and -201.3 kJ mol-1, respectively. The mean element-sulphur bond enthalpies were also calculated as 122 and 147 kJ mol-1 for Sb-S and Bi-S bonds, respectively. The acidity order AsI3 > SbI3 > BiI3 was established.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/0040-6031(92)85279-5
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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