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dc.contributor.author | Muñoz Roca, María Del Carmen | es_ES |
dc.contributor.author | Julve, M. | es_ES |
dc.contributor.author | Lloret, F. | es_ES |
dc.contributor.author | Faus, J. | es_ES |
dc.contributor.author | Andruh, M. | es_ES |
dc.date.accessioned | 2020-03-11T10:02:47Z | |
dc.date.available | 2020-03-11T10:02:47Z | |
dc.date.issued | 1998-09-21 | es_ES |
dc.identifier.issn | 0300-9246 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/138705 | |
dc.description.abstract | [EN] Two new chromium(III)-containing complexes of formula AsPh4[Cr(bipy)(ox)(2)]. H2O 1 and [NaCr(bipy)(ox)(2)(H2O)]. 2H(2)O 2 (bipy = 2,2'-bipyridine and ox = oxalate dianion) have been synthesized and characterized by single-crystal X-ray diffraction. The structure of 1 consists of discrete [Cr(bipy)(ox)(2)](-) mononuclear anions, tetraphenylarsonium cations and uncoordinated water molecules. The structure of 2 reveals a novel two-dimensional framework which is made up of oxalato-bridged bimetallic Cr-III-Na-I helical chains which are interconnected through centrosymmetric Na2O2 units. Within the chain, a regular alternation of the metal ions is observed, the oxalate group acting as a bis(chelating) ligand. In addition to this coordination mode, two oxalates each act as monodentate ligands towards a sodium atom of a neighbouring chain thus leading to a sheetlike polymeric structure. The chromium environment is distorted octahedral in both complexes: two nitrogen atoms from a bidentate bipy ligand and four oxygen atoms from either two chelating (1) or two bis(chelating) (2) oxalate groups build the coordination polyhedron around the chromium atom. The Cr-N bond lengths [values in the ranges 2.077(3)-2.057(3) (1) and 2.067(4)-2.058(4) Angstrom (2)] are somewhat longer than the Cr-O ones [values in the ranges 1.960(2)-1.946(2) (1) and 1.968(3)-1.949(3) Angstrom (2)]. The sodium atom in 2 is also six-coordinated: a coordinated water molecule [2.371(5) and 2.325(4) Angstrom for Na(1)-O(17) and Na(2)-O(18), respectively] and five oxygens from three oxalate groups [values of the Na-O (ox) bonds in the ranges 2.511(4)-2.331(4) and 2.481(4)-2.364(4) Angstrom around Na(1) and Na(2), respectively] build a distorted octahedral NaO6 environment. The intralayer chromium-sodium and sodium-sodium distances through bridging oxalate in 2 vary in the ranges 5.657(4)-5.579(2) and 3.534(3)-3.497(4) Angstrom, respectively. Variable-temperature magnetic susceptibility measurements of 1 and 2 reveal the occurrence of very weak antiferromagnetic interactions together with zero-field splitting effects in both compounds. The use of the [Cr(bipy)(ox)(2)](-) unit as a ligand towards different univalent and divalent metal ions aimed at designing new heterobimetallic systems is analysed and discussed in the light of available structural data. | es_ES |
dc.description.sponsorship | Financial support from the Spanish Dirección General de Investigación Científica y Técnica (DGICYT) (Project PB94- 1002), the Training and Mobility Research Program from the European Community (TMR Contract ERBFMRXCT980181) and the COST Program (Action 518) is gratefully acknowledged. | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | Royal Society of Chemistry | es_ES |
dc.relation.ispartof | Journal of the Chemical Society. Dalton transactions | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject.classification | FISICA APLICADA | es_ES |
dc.title | Influence of the Counterion on the Coordinating Properties of (2,2'-bipiridyl)bis(oxalato)chromate(III) anion: Crystal Structures and Magnetic properties of AsPh4[Cr(bipy)(ox)2]H2O and [NaCr(bipy)(ox)2(H2O)].2H2O | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1039/a804990d | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MEC//PB94-1002/ | 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 | Muñoz Roca, MDC.; Julve, M.; Lloret, F.; Faus, J.; Andruh, M. (1998). Influence of the Counterion on the Coordinating Properties of (2,2'-bipiridyl)bis(oxalato)chromate(III) anion: Crystal Structures and Magnetic properties of AsPh4[Cr(bipy)(ox)2]H2O and [NaCr(bipy)(ox)2(H2O)].2H2O. Journal of the Chemical Society. Dalton transactions. (18):3125-3131. https://doi.org/10.1039/a804990d | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1039/a804990d | es_ES |
dc.description.upvformatpinicio | 3125 | es_ES |
dc.description.upvformatpfin | 3131 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.issue | 18 | es_ES |
dc.relation.pasarela | S\16534 | es_ES |
dc.contributor.funder | Ministerio de Educación y Ciencia | es_ES |