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Temperature dependence of the crystal lattice organization of coordination compounds involving nitronyl nitroxide radicals: a magnetic and structural investigation.

hal.structure.identifierChemistry Department
dc.contributor.authorFETTOUHI, Mohammed
hal.structure.identifierChemistry Department
dc.contributor.authorEL-ALI, Bassam
hal.structure.identifierChemistry Department
dc.contributor.authorEL-GHANAM, Abdel Moneim
hal.structure.identifierLaboratoire de Chimie du solide et inorganique moléculaire [LCSIM]
dc.contributor.authorGOLHEN, Stéphane
hal.structure.identifierOrganométalliques: Matériaux et Catalyse
dc.contributor.authorOUAHAB, Lahcène
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDARO, Nathalie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSUTTER, Jean-Pascal
dc.date.issued2002
dc.identifier.issn0020-1669
dc.description.abstractEnFour new mononuclear complexes of formula Cd(PN)(4)(NCS)(2) (A), Cd(PNN)(4)(N(3))(2) (B), Zn(PNN)(4)(N(3))(2) (C), and Zn(PNN)(2)(NCS)(2) (D), where PNN stands for 2-(4-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and PN for 2-(4-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl, were synthesized and structurally and magnetically characterized. The X-ray structures of compounds B and C were also determined at 90 K. Compounds A[bond]C crystallize in the triclinic space group P 1 macro (No. 2), and D crystallizes in the monoclinic space group P2(1)/m (No. 11). A[bond]C adopt a centrosymmetric distorted octahedral geometry in which the metal ions are bonded to four radical ligands through the nitrogen atom of the pyridyl rings and the azido or thiocyanato ligands occupy the apical positions. Compound D adopts a distorted tetrahedral geometry in which the zinc ion is bonded to two radicals and two thiocyanato ligands. As suggested by their magnetic behavior, the low-temperature X-ray structures of B and C show that these compounds undergo a clear structural change with respect to the room-temperature structures. The experimental magnetic behaviors were perfectly reproduced by a dimer model for A[bond]C and an alternating chain model for D while the sudden breaks observed in the chi(M)T versus T curves for B and C were well accounted for by the high- and low-temperature X-ray structures. For all these complexes the crystal structures favor significant overlap between molecular magnetic orbitals leading to rather strong intermolecular antiferromagnetic interactions.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enTemperature dependence of the crystal lattice organization of coordination compounds involving nitronyl nitroxide radicals: a magnetic and structural investigation.
dc.typeArticle de revue
dc.identifier.doi10.1021/ic020021p
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page3705-3712
bordeaux.volume41
bordeaux.issue14
bordeaux.peerReviewedoui
hal.identifierhal-00717025
hal.version1
hal.popularnon
hal.audienceInternationale
dc.subject.itMagnetism
dc.subject.itChemical structure
dc.subject.itCrystal lattice
dc.subject.itCoordination compounds
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00717025v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Inorganic%20Chemistry&rft.date=2002&rft.volume=41&rft.issue=14&rft.spage=3705-3712&rft.epage=3705-3712&rft.eissn=0020-1669&rft.issn=0020-1669&rft.au=FETTOUHI,%20Mohammed&EL-ALI,%20Bassam&EL-GHANAM,%20Abdel%20Moneim&GOLHEN,%20St%C3%A9phane&OUAHAB,%20Lahc%C3%A8ne&rft.genre=article


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