Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes

Autores
Benzo, Fabián; Massaferro, Adriana; Queirolo, Marcelo; Sienra, Beatriz; Capparelli, Alberto Luis; Mártire, Daniel Osvaldo
Año de publicación
1996
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Base hydrolysis and aquation of trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ (where X = Cl, Br and NO3) complexes are reported. Both types of reactions are four to eight times faster than the corresponding reactions for [Co(NH3)5X]2+ complexes. The positive activation entropies of the base hydrolysis for all the studied trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ ions and the stereochemistry of the hydroxo products are indicative of a dissociative conjugate base, Dcb, mechanism. The steric course of the base hydrolysis differs significantly from that of the parent penta-ammines. For the aquation reactions, the activation enthalpies of the trans-methylamine and penta-ammine complexes are similar, while the activation entropies are more positive (or less negative) for the former. These results are interpreted in terms of an Id mechanism.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Base hydrolysis
aquation reactions
activation entropies
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/159209
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/159209
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexesBenzo, FabiánMassaferro, AdrianaQueirolo, MarceloSienra, BeatrizCapparelli, Alberto LuisMártire, Daniel OsvaldoQuímicaBase hydrolysisaquation reactionsactivation entropiesBase hydrolysis and aquation of trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ (where X = Cl, Br and NO3) complexes are reported. Both types of reactions are four to eight times faster than the corresponding reactions for [Co(NH3)5X]2+ complexes. The positive activation entropies of the base hydrolysis for all the studied trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ ions and the stereochemistry of the hydroxo products are indicative of a dissociative conjugate base, Dcb, mechanism. The steric course of the base hydrolysis differs significantly from that of the parent penta-ammines. For the aquation reactions, the activation enthalpies of the trans-methylamine and penta-ammine complexes are similar, while the activation entropies are more positive (or less negative) for the former. These results are interpreted in terms of an Id mechanism.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1996info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1915-1921http://sedici.unlp.edu.ar/handle/10915/159209enginfo:eu-repo/semantics/altIdentifier/issn/0277-5387info:eu-repo/semantics/altIdentifier/doi/10.1016/0277-5387(95)00473-4info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-11-12T11:05:59Zoai:sedici.unlp.edu.ar:10915/159209Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-11-12 11:05:59.383SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
title Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
spellingShingle Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
Benzo, Fabián
Química
Base hydrolysis
aquation reactions
activation entropies
title_short Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
title_full Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
title_fullStr Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
title_full_unstemmed Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
title_sort Base hydrolysis and aquation of trans-methyl-substituted acidopenta-amminecobalt(III) complexes
dc.creator.none.fl_str_mv Benzo, Fabián
Massaferro, Adriana
Queirolo, Marcelo
Sienra, Beatriz
Capparelli, Alberto Luis
Mártire, Daniel Osvaldo
author Benzo, Fabián
author_facet Benzo, Fabián
Massaferro, Adriana
Queirolo, Marcelo
Sienra, Beatriz
Capparelli, Alberto Luis
Mártire, Daniel Osvaldo
author_role author
author2 Massaferro, Adriana
Queirolo, Marcelo
Sienra, Beatriz
Capparelli, Alberto Luis
Mártire, Daniel Osvaldo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Química
Base hydrolysis
aquation reactions
activation entropies
topic Química
Base hydrolysis
aquation reactions
activation entropies
dc.description.none.fl_txt_mv Base hydrolysis and aquation of trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ (where X = Cl, Br and NO3) complexes are reported. Both types of reactions are four to eight times faster than the corresponding reactions for [Co(NH3)5X]2+ complexes. The positive activation entropies of the base hydrolysis for all the studied trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ ions and the stereochemistry of the hydroxo products are indicative of a dissociative conjugate base, Dcb, mechanism. The steric course of the base hydrolysis differs significantly from that of the parent penta-ammines. For the aquation reactions, the activation enthalpies of the trans-methylamine and penta-ammine complexes are similar, while the activation entropies are more positive (or less negative) for the former. These results are interpreted in terms of an Id mechanism.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description Base hydrolysis and aquation of trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ (where X = Cl, Br and NO3) complexes are reported. Both types of reactions are four to eight times faster than the corresponding reactions for [Co(NH3)5X]2+ complexes. The positive activation entropies of the base hydrolysis for all the studied trans-[Co(NH₃)₄(NH₂CH₃)X]²⁺ ions and the stereochemistry of the hydroxo products are indicative of a dissociative conjugate base, Dcb, mechanism. The steric course of the base hydrolysis differs significantly from that of the parent penta-ammines. For the aquation reactions, the activation enthalpies of the trans-methylamine and penta-ammine complexes are similar, while the activation entropies are more positive (or less negative) for the former. These results are interpreted in terms of an Id mechanism.
publishDate 1996
dc.date.none.fl_str_mv 1996
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/159209
url http://sedici.unlp.edu.ar/handle/10915/159209
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0277-5387
info:eu-repo/semantics/altIdentifier/doi/10.1016/0277-5387(95)00473-4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1915-1921
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.24909

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