Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates

Detalhes bibliográficos
Autor(a) principal: Benedini,Valéria D.
Data de Publicação: 2006
Outros Autores: Antunes,Patrícia A., Cavalheiro,Éder T. G., Chierice,Gilberto O.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000400008
Resumo: Thermogravimetric and differential scanning calorimetric investigation of the thermal behavior of nickel(II), copper(II), zinc(II) and cadmium(II) hexamethylenedithiocarbamates were performed under nitrogen and air atmospheres in order to investigate the steps and products of thermal decomposition. When obtained in a crystalline form, the decomposition products were identified by their X-ray diffraction patterns. Metal sulfides and oxides were the major residues under nitrogen and air atmospheres, respectively. Spectrophotometric measurements in the ultraviolet region were used to estimate the pKa = 3.6 ± 0.2 for the haxamethylenedithiocarbamic acid at 0.50 mol dm-3 ionic strength (KCl) at 25.0 °C and the kinetic parameters of decomposition at different pH values (k lim = 2.21 x 10-2 s-1 and t½ lim = 156 s).
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spelling Thermoanalytical and solution stability studies of hexamethylenedithiocarbamateshexamethylenedithiocarbamatethermogravimetrydifferential scanning calorimetrydecomposition rate constantThermogravimetric and differential scanning calorimetric investigation of the thermal behavior of nickel(II), copper(II), zinc(II) and cadmium(II) hexamethylenedithiocarbamates were performed under nitrogen and air atmospheres in order to investigate the steps and products of thermal decomposition. When obtained in a crystalline form, the decomposition products were identified by their X-ray diffraction patterns. Metal sulfides and oxides were the major residues under nitrogen and air atmospheres, respectively. Spectrophotometric measurements in the ultraviolet region were used to estimate the pKa = 3.6 ± 0.2 for the haxamethylenedithiocarbamic acid at 0.50 mol dm-3 ionic strength (KCl) at 25.0 °C and the kinetic parameters of decomposition at different pH values (k lim = 2.21 x 10-2 s-1 and t½ lim = 156 s).Sociedade Brasileira de Química2006-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000400008Journal of the Brazilian Chemical Society v.17 n.4 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000400008info:eu-repo/semantics/openAccessBenedini,Valéria D.Antunes,Patrícia A.Cavalheiro,Éder T. G.Chierice,Gilberto O.eng2006-08-25T00:00:00Zoai:scielo:S0103-50532006000400008Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-08-25T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
title Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
spellingShingle Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
Benedini,Valéria D.
hexamethylenedithiocarbamate
thermogravimetry
differential scanning calorimetry
decomposition rate constant
title_short Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
title_full Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
title_fullStr Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
title_full_unstemmed Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
title_sort Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
author Benedini,Valéria D.
author_facet Benedini,Valéria D.
Antunes,Patrícia A.
Cavalheiro,Éder T. G.
Chierice,Gilberto O.
author_role author
author2 Antunes,Patrícia A.
Cavalheiro,Éder T. G.
Chierice,Gilberto O.
author2_role author
author
author
dc.contributor.author.fl_str_mv Benedini,Valéria D.
Antunes,Patrícia A.
Cavalheiro,Éder T. G.
Chierice,Gilberto O.
dc.subject.por.fl_str_mv hexamethylenedithiocarbamate
thermogravimetry
differential scanning calorimetry
decomposition rate constant
topic hexamethylenedithiocarbamate
thermogravimetry
differential scanning calorimetry
decomposition rate constant
description Thermogravimetric and differential scanning calorimetric investigation of the thermal behavior of nickel(II), copper(II), zinc(II) and cadmium(II) hexamethylenedithiocarbamates were performed under nitrogen and air atmospheres in order to investigate the steps and products of thermal decomposition. When obtained in a crystalline form, the decomposition products were identified by their X-ray diffraction patterns. Metal sulfides and oxides were the major residues under nitrogen and air atmospheres, respectively. Spectrophotometric measurements in the ultraviolet region were used to estimate the pKa = 3.6 ± 0.2 for the haxamethylenedithiocarbamic acid at 0.50 mol dm-3 ionic strength (KCl) at 25.0 °C and the kinetic parameters of decomposition at different pH values (k lim = 2.21 x 10-2 s-1 and t½ lim = 156 s).
publishDate 2006
dc.date.none.fl_str_mv 2006-08-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000400008
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000400008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532006000400008
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.17 n.4 2006
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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