Combined kinetic and DFT studies on the stabilization of the pyramidal form of H3PO2 at the heterometal site of [Mo3M’S4(H2O)10]4+ clusters (M’= Pd, Ni)
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Altres documents de l'autoria: Algarra, Andrés G.; Fernández-Trujillo, M. Jesús; Safont Villarreal, Vicent Sixte; Hernández Molina, Rita; García Basallote, Manuel
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Combined kinetic and DFT studies on the stabilization of the pyramidal form of H3PO2 at the heterometal site of [Mo3M’S4(H2O)10]4+ clusters (M’= Pd, Ni)Autoria
Data de publicació
2009Editor
Royal Society of ChemistryISSN
1477-9226Cita bibliogràfica
GARCÍA ALGARRA, Andrés, et al. Combined kinetic and DFT studies on the stabilization of the pyramidal form of H 3 PO 2 at the heterometal site of [Mo 3 M′ S 4 (H 2 O) 10] 4+ clusters (M′= Pd, Ni). Dalton Transactions, 2009, no 9, p. 1579-1586.Tipus de document
info:eu-repo/semantics/articleVersió
info:eu-repo/semantics/acceptedVersionResum
Kinetic and DFT studies have been carried out on the reaction of the [Mo3M’S4(H2O)10]4+
clusters (M’= Pd, Ni) with H3PO2 to form the [Mo3M’(pyr-H3PO2)S4(H2O)9]4+ complexes, in
which the rare pyramidal form of H3PO2 ... [+]
Kinetic and DFT studies have been carried out on the reaction of the [Mo3M’S4(H2O)10]4+
clusters (M’= Pd, Ni) with H3PO2 to form the [Mo3M’(pyr-H3PO2)S4(H2O)9]4+ complexes, in
which the rare pyramidal form of H3PO2 is stabilized by coordination to the M’ site of the
clusters. The reaction proceeds with biphasic kinetics, both steps showing a first order
dependence with respect to H3PO2. These results are interpreted in terms of a mechanism that
involves an initial substitution step in which one tetrahedral H3PO2 molecule coordinates to
M’ through the oxygen atom of the P=O bond, followed by a second step that consists in
tautomerization of coordinated H3PO2 assisted by a second H3PO2 molecule. DFT studies
have been carried out to obtain information on the details of both kinetic steps, the major
finding being that the role of the additional H3PO2 molecule in the second step consists in
catalysing a hydrogen shift from phosphorus to oxygen in O-coordinated H3PO2, which is
made possible by its capability of accepting a proton from P-H to form H4PO2
+ and then
transfer it to the oxygen. DFT studies have been also carried out on the reaction at the Mo
centres to understand the reasons that make these metal centres ineffective for promoting
tautomerization [-]
Publicat a
Dalton Transactions, 2009, n. 9Drets d'accés
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