Thermoanalytical and solution stability studies of hexamethylenedithiocarbamates
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
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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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 |
_version_ |
1750318167303913472 |