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Spin Crossover in Six-Coordinate [Fe(L)2(NCX)2] Compounds with L=DPQ=2,3-bis-(2'-pyridil)-quinoxaline, ABPT=4-amino-3,5-bis(pyridin-2-yl)-1,2,4-trazole and X=S, Se: synthesis, magnetic properties and single crystal studies

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Spin Crossover in Six-Coordinate [Fe(L)2(NCX)2] Compounds with L=DPQ=2,3-bis-(2'-pyridil)-quinoxaline, ABPT=4-amino-3,5-bis(pyridin-2-yl)-1,2,4-trazole and X=S, Se: synthesis, magnetic properties and single crystal studies

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dc.contributor.author Moliner, N. es_ES
dc.contributor.author Muñoz Roca, María Del Carmen es_ES
dc.contributor.author Van Koningsbruggen, P. es_ES
dc.contributor.author Real, J. A. es_ES
dc.date.accessioned 2020-04-17T12:48:30Z
dc.date.available 2020-04-17T12:48:30Z
dc.date.issued 1998-06-01 es_ES
dc.identifier.issn 0020-1693 es_ES
dc.identifier.uri http://hdl.handle.net/10251/140849
dc.description.abstract [EN] The iron(II) compounds of formulae [Fe(DPQ)2(NCS)2]·CO(CH)3)2(DPQ = 2,3-bis-(2¿-pyridyl)-quinoxaline) (1) and [Fe(ABPT)2-(NCX)2] (ABPT = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) X = S (2) and Se (3) were synthesized and the crystal structure of 1 determined by X-ray diffraction methods. It crystallizes in the monoclinic system . The structure is made up of discrete [Fe(DPQ)2(NCS)2] units. Each metal atom is in a distorted FeN6 octahedral environment, the Fe¿N bonds ranging from 2.013(8) Å to 2.425(8) Å. Variable-temperature magnetic susceptibility data in the temperature range 290¿4.2 K revealed that 1 is high spin, in contrast to 2 and 3 which show a moderately cooperative high spin ¿ low spin (HS ¿ LS) transition, centred at and 224 K for 2 and 3 respectively. The thermodynamic model of Slichter and Drickamer was applied to account for the magnetic data. The intermolecular interaction parameter, the enthalpy and entropy changes associated with the spin transition of 2 were estimated as ¿ = 2.3 kJ mol¿1, ¿H = 10.7 kJ mol¿1 and ¿S = 58 J mol¿1K¿1 respectively. es_ES
dc.description.sponsorship We thank the Dirección General de lnvestigación Científica y Técnica (DGICYT) (Spain) for financial support through Project PB95-1002. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Inorganica Chimica Acta es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Crystal structures es_ES
dc.subject Magnetic properties es_ES
dc.subject Iron complexes es_ES
dc.subject Six-coordinate complexes es_ES
dc.subject Spin crossover es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title Spin Crossover in Six-Coordinate [Fe(L)2(NCX)2] Compounds with L=DPQ=2,3-bis-(2'-pyridil)-quinoxaline, ABPT=4-amino-3,5-bis(pyridin-2-yl)-1,2,4-trazole and X=S, Se: synthesis, magnetic properties and single crystal studies es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/S0020-1693(97)05954-9 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MEC//PB95-1002/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.description.bibliographicCitation Moliner, N.; Muñoz Roca, MDC.; Van Koningsbruggen, P.; Real, JA. (1998). Spin Crossover in Six-Coordinate [Fe(L)2(NCX)2] Compounds with L=DPQ=2,3-bis-(2'-pyridil)-quinoxaline, ABPT=4-amino-3,5-bis(pyridin-2-yl)-1,2,4-trazole and X=S, Se: synthesis, magnetic properties and single crystal studies. Inorganica Chimica Acta. 274(1):1-6. https://doi.org/10.1016/S0020-1693(97)05954-9 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/S0020-1693(97)05954-9 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 6 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 274 es_ES
dc.description.issue 1 es_ES
dc.relation.pasarela S\16533 es_ES
dc.contributor.funder Ministerio de Educación y Cultura es_ES


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