Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]

A sodium salt containing the binuclear complex anion μ-(p-benzoquinonediimine) bis(pentacyanoferrate(II)], [(NC)5FeHNC6H4NHFe(CN)5]6- [first described by Herington(3)) has been isolated as a solid from an oxygenated solution ofp-phenylenediamine and sodium amminepentacyanoferrate(II) in a 1∶2 molar...

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Autores principales: Cutin, Edgardo H., Katz, Néstor E., Williams, Patricia Ana María, Aymonino, Pedro José
Formato: Articulo
Lenguaje:Inglés
Publicado: 1991
Materias:
Química
Ciencias Exactas
sodium salt
spectra point
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/140227
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-140227
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Ciencias Exactas
sodium salt
spectra point
spellingShingle Química
Ciencias Exactas
sodium salt
spectra point
Cutin, Edgardo H.
Katz, Néstor E.
Williams, Patricia Ana María
Aymonino, Pedro José
Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]
topic_facet Química
Ciencias Exactas
sodium salt
spectra point
description A sodium salt containing the binuclear complex anion μ-(p-benzoquinonediimine) bis(pentacyanoferrate(II)], [(NC)5FeHNC6H4NHFe(CN)5]6- [first described by Herington(3)) has been isolated as a solid from an oxygenated solution ofp-phenylenediamine and sodium amminepentacyanoferrate(II) in a 1∶2 molar ratio. The i.r. and u.v.-vis. spectra point to a quinonediimine structure for the bridging ligand. In aqueous solution this ion dissociates into aquopentacyanoferrate(II) andp-benzoquinonediiminepentacyanoferrate(II), with kobs=1.1×10−2s−1. The formation of the mononuclear pentacyanoferrate(II) complex of protonatedp-benzoquinonediimine is favoured at pH≤8. The pKa value for the coordinated diimine isca. two orders of magnitude higher than that for the free ligand, thus indicating thatp-benzoquinonediimine is stabilized by coordination to the [Fe(CN)5]3- moiety, though to a lesser extent than in rutheniumammine analogues.
format Articulo
Articulo
author Cutin, Edgardo H.
Katz, Néstor E.
Williams, Patricia Ana María
Aymonino, Pedro José
author_facet Cutin, Edgardo H.
Katz, Néstor E.
Williams, Patricia Ana María
Aymonino, Pedro José
author_sort Cutin, Edgardo H.
title Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]
title_short Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]
title_full Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]
title_fullStr Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]
title_full_unstemmed Spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(II)]
title_sort spectral properties and reactivity of the binuclear complex ion μ-(p-benzoquinonediimine)bis[pentacyanoferrate(ii)]
publishDate 1991
url http://sedici.unlp.edu.ar/handle/10915/140227
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