Oxotris(oxalate)niobate(v): an oxalate delivery agent in the design of building blocks

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dc.creatorWillian Xerxes Coelho Oliveira
dc.creatorCynthia Lopes Martins Pereira
dc.creatorCarlos Basílio Pinheiro
dc.creatorFrancesc Lloret
dc.creatorMiguel Julve
dc.date.accessioned2023-02-01T19:44:34Z
dc.date.accessioned2025-09-08T23:39:33Z
dc.date.available2023-02-01T19:44:34Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1080/00958972.2018.1428313
dc.identifier.issn1029-0389
dc.identifier.urihttps://hdl.handle.net/1843/49393
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Coordination Chemistry
dc.rightsAcesso Restrito
dc.subjectCompostos metálicos
dc.subjectPropriedades magnéticas
dc.subjectCristalografia de raio X
dc.subjectCobre
dc.subjectFerro
dc.subjectNióbio
dc.subjectQuímica inorgânica
dc.subject.otherCopper(ii)
dc.subject.otherIron(iii)
dc.subject.otherNiobium(V)
dc.subject.otherOxalate
dc.subject.otherCyanide
dc.subject.otherHeterobimetallic compounds
dc.subject.otherMagnetic properties
dc.titleOxotris(oxalate)niobate(v): an oxalate delivery agent in the design of building blocks
dc.typeArtigo de periódico
local.citation.epage724
local.citation.issue5
local.citation.spage707
local.citation.volume71
local.description.resumoThis work concerns the oxalate delivery process that occurs when using (NH4)3[NbO(C2O4)3]·6H2O as a suitable oxalate source in the synthesis of two compounds, [Cu(dmphen)(C2O4)(H2O)] (1) and [{Cu(dmphen)(CH3OH)}2(μ-C2O4)](ClO4)2 (2) (dmphen = 2,9-dimethyl-1,10-phenanthroline). {[Fe{HB(pz)3}(CN)2(μ-CN)]2[{Cu(dmphen)}2(μ-C2O4)]}∙xCH3OH (3) (2.0 ≤ x ≤ 2.4) was obtained by reacting 2 and PPh4[Fe{HB(pz)3}(CN)3]∙H2O [ PPh+4 = tetraphenylphosphonium and HB(pz)-3 = tris(pyrazolyl)borate]. Crystal structures of 1–3 have been determined by single-crystal X-ray diffraction experiments: 1 is a mononuclear trigonal bipyramidal copper(II) species, 2 is a centrosymmetric oxalato-bridged dicopper(II) complex, and 3 consists of centrosymmetric tetranuclear FeIII2CuII2 units with intramolecular iron–copper and copper–copper distances around 5.010(1) and 5.1833(9) Å, respectively. Variable-temperature magnetic measurements of 2 and 3 were carried out from 50 to 350 (1) and 1.9 to 300 K (3). A strong antiferromagnetic interaction between copper(II) ions occurs in 2 (J = −340 cm−¹, the spin Hamiltonian being defined as H=-JScu1·Scu1i). Analysis of the magnetic data of 3 shows magnetic interactions across the oxalate (J1 = −341 cm−¹) and single cyanide (J2 = +12.9 cm−¹) … (J2 = +12.9 cm−¹) bridges. Simple symmetry considerations of the interacting magnetic orbitals in 2 and 3 provide a clear picture of the exchange pathways involved in these complexes.
local.identifier.orcidhttps://orcid.org/0000-0003-0722-5352
local.identifier.orcidhttps://orcid.org/0000-0002-3799-8092
local.identifier.orcidhttps://orcid.org/0000-0002-8674-1779
local.identifier.orcidhttps://orcid.org/0000-0003-2959-0879
local.identifier.orcidhttps://orcid.org/0000-0001-9006-8268
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.tandfonline.com/doi/full/10.1080/00958972.2018.1428313

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