Solution and solid state thermal stability of morpholinedithiocarbamates
Autor(a) principal: | |
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Data de Publicação: | 2001 |
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=S0103-50532001000400005 |
Resumo: | Thermogravimetric and differential scanning calorimetric investigation of the thermal behavior of NH4+, Mn2+, Co2+, Ni2+ e Cu2+ morpholinedithiocarbamates were performed under nitrogen and air atmospheres in order to investigate the effect, in the thermal decomposition, of the presence of an oxygen as the heteroatom in the amine ring. Decomposition products were identified by their X-ray diffraction patterns. Metal sulfites and oxides were the major residues under nitrogen and air atmospheres, respectively. Spectrophotometric measurements were used to estimate the pKa =3.56 for the morpholinedithiocarbamic acid at 0.50 mol dm-3 ionic strength (NaClO4) at 25.0 °C and kinetic parameters of decomposition at different pH values (k lim = 0.14 ± 0.04 s-1 e t½ lim = 5.3 ± 1.2 s). |
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Journal of the Brazilian Chemical Society (Online) |
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Solution and solid state thermal stability of morpholinedithiocarbamatesmorpholinedithiocarbamatesthermogravimetrydifferential scanning calorimetrydecomposition rate constantThermogravimetric and differential scanning calorimetric investigation of the thermal behavior of NH4+, Mn2+, Co2+, Ni2+ e Cu2+ morpholinedithiocarbamates were performed under nitrogen and air atmospheres in order to investigate the effect, in the thermal decomposition, of the presence of an oxygen as the heteroatom in the amine ring. Decomposition products were identified by their X-ray diffraction patterns. Metal sulfites and oxides were the major residues under nitrogen and air atmospheres, respectively. Spectrophotometric measurements were used to estimate the pKa =3.56 for the morpholinedithiocarbamic acid at 0.50 mol dm-3 ionic strength (NaClO4) at 25.0 °C and kinetic parameters of decomposition at different pH values (k lim = 0.14 ± 0.04 s-1 e t½ lim = 5.3 ± 1.2 s).Sociedade Brasileira de Química2001-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000400005Journal of the Brazilian Chemical Society v.12 n.4 2001reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532001000400005info:eu-repo/semantics/openAccessAntunes,Patrícia A.Breviglieri,Susete T.Chierice,Gilberto O.Cavalheiro,Éder T. G.eng2001-10-17T00:00:00Zoai:scielo:S0103-50532001000400005Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2001-10-17T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Solution and solid state thermal stability of morpholinedithiocarbamates |
title |
Solution and solid state thermal stability of morpholinedithiocarbamates |
spellingShingle |
Solution and solid state thermal stability of morpholinedithiocarbamates Antunes,Patrícia A. morpholinedithiocarbamates thermogravimetry differential scanning calorimetry decomposition rate constant |
title_short |
Solution and solid state thermal stability of morpholinedithiocarbamates |
title_full |
Solution and solid state thermal stability of morpholinedithiocarbamates |
title_fullStr |
Solution and solid state thermal stability of morpholinedithiocarbamates |
title_full_unstemmed |
Solution and solid state thermal stability of morpholinedithiocarbamates |
title_sort |
Solution and solid state thermal stability of morpholinedithiocarbamates |
author |
Antunes,Patrícia A. |
author_facet |
Antunes,Patrícia A. Breviglieri,Susete T. Chierice,Gilberto O. Cavalheiro,Éder T. G. |
author_role |
author |
author2 |
Breviglieri,Susete T. Chierice,Gilberto O. Cavalheiro,Éder T. G. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Antunes,Patrícia A. Breviglieri,Susete T. Chierice,Gilberto O. Cavalheiro,Éder T. G. |
dc.subject.por.fl_str_mv |
morpholinedithiocarbamates thermogravimetry differential scanning calorimetry decomposition rate constant |
topic |
morpholinedithiocarbamates thermogravimetry differential scanning calorimetry decomposition rate constant |
description |
Thermogravimetric and differential scanning calorimetric investigation of the thermal behavior of NH4+, Mn2+, Co2+, Ni2+ e Cu2+ morpholinedithiocarbamates were performed under nitrogen and air atmospheres in order to investigate the effect, in the thermal decomposition, of the presence of an oxygen as the heteroatom in the amine ring. Decomposition products were identified by their X-ray diffraction patterns. Metal sulfites and oxides were the major residues under nitrogen and air atmospheres, respectively. Spectrophotometric measurements were used to estimate the pKa =3.56 for the morpholinedithiocarbamic acid at 0.50 mol dm-3 ionic strength (NaClO4) at 25.0 °C and kinetic parameters of decomposition at different pH values (k lim = 0.14 ± 0.04 s-1 e t½ lim = 5.3 ± 1.2 s). |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-08-01 |
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=S0103-50532001000400005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000400005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532001000400005 |
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.12 n.4 2001 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_ |
1750318164515749888 |