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Article: Synthesis, properties and crystal structures of iron-(II) and -(III) complexes of 2,2′:6′,2″:6″,2‴-quaterpyridine

TitleSynthesis, properties and crystal structures of iron-(II) and -(III) complexes of 2,2′:6′,2″:6″,2‴-quaterpyridine
Authors
Issue Date1995
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
Citation
Journal Of The Chemical Society, Dalton Transactions, 1995 n. 18, p. 2961-2966 How to Cite?
AbstractSeveral iron complexes of 2,2′:6′,2″:6″,2‴-quaterpyridine (L) in di- and tri-valent oxidation states have been prepared, and the structures of [FeL(OH2)2][ClO4]2 1, [{FeL(ClO4)}2(μ-O)]·8.5H2O 2.8.5H2O and [{FeL(Cl)}2(μ-O)][ClO4]2·2H 2O 3·2H2O, have been determined by X-ray crystal analyses. In each complex, the quaterpyridine ligand is planar. In 2, the FeII is seven-co-ordinate with the [ClO4]- acting as a bidentate ligand with Fe-O-Fe 155.2(4)°. In 3, the Fe-O-Fe unit is linear and the Fe-O distance of 1.779(1) Å is considerably shorter than the Fe-O(OH2) distance of 2.141(5) Å in 1. The results of molecular orbitals calculations revealed that the unoccupied molecular orbitals of 2 and 3 mainly comprise the π* orbital of L. In 2, bending of the Fe-O-Fe unit gives rise to a decrease in the antibonding interaction between Fe(dyz) and O(Py) orbitals. Complex 3 is less stable in the spin-paired (S = 0) than in open-shell (S = 1) state by 49.3 kcal mol-1. This coincides with magnetic susceptibility measurements which show that 3 is paramagnetic with μeff 1.75 μB per iron atom.
Persistent Identifierhttp://hdl.handle.net/10722/168252
ISSN
2002 Impact Factor: 3.023
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChe, CMen_US
dc.contributor.authorChan, CWen_US
dc.contributor.authorYang, SMen_US
dc.contributor.authorGuo, CXen_US
dc.contributor.authorLee, CYen_US
dc.contributor.authorPeng, SMen_US
dc.date.accessioned2012-10-08T03:16:41Z-
dc.date.available2012-10-08T03:16:41Z-
dc.date.issued1995en_US
dc.identifier.citationJournal Of The Chemical Society, Dalton Transactions, 1995 n. 18, p. 2961-2966en_US
dc.identifier.issn1472-7773en_US
dc.identifier.urihttp://hdl.handle.net/10722/168252-
dc.description.abstractSeveral iron complexes of 2,2′:6′,2″:6″,2‴-quaterpyridine (L) in di- and tri-valent oxidation states have been prepared, and the structures of [FeL(OH2)2][ClO4]2 1, [{FeL(ClO4)}2(μ-O)]·8.5H2O 2.8.5H2O and [{FeL(Cl)}2(μ-O)][ClO4]2·2H 2O 3·2H2O, have been determined by X-ray crystal analyses. In each complex, the quaterpyridine ligand is planar. In 2, the FeII is seven-co-ordinate with the [ClO4]- acting as a bidentate ligand with Fe-O-Fe 155.2(4)°. In 3, the Fe-O-Fe unit is linear and the Fe-O distance of 1.779(1) Å is considerably shorter than the Fe-O(OH2) distance of 2.141(5) Å in 1. The results of molecular orbitals calculations revealed that the unoccupied molecular orbitals of 2 and 3 mainly comprise the π* orbital of L. In 2, bending of the Fe-O-Fe unit gives rise to a decrease in the antibonding interaction between Fe(dyz) and O(Py) orbitals. Complex 3 is less stable in the spin-paired (S = 0) than in open-shell (S = 1) state by 49.3 kcal mol-1. This coincides with magnetic susceptibility measurements which show that 3 is paramagnetic with μeff 1.75 μB per iron atom.en_US
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/daltonen_US
dc.relation.ispartofJournal of the Chemical Society, Dalton Transactionsen_US
dc.titleSynthesis, properties and crystal structures of iron-(II) and -(III) complexes of 2,2′:6′,2″:6″,2‴-quaterpyridineen_US
dc.typeArticleen_US
dc.identifier.emailChe, CM:cmche@hku.hken_US
dc.identifier.authorityChe, CM=rp00670en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/DT9950002961en_US
dc.identifier.scopuseid_2-s2.0-37049089928en_US
dc.identifier.issue18en_US
dc.identifier.spage2961en_US
dc.identifier.epage2966en_US
dc.identifier.isiWOS:A1995RW93000007-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US
dc.identifier.scopusauthoridChan, CW=7404814723en_US
dc.identifier.scopusauthoridYang, SM=7408521494en_US
dc.identifier.scopusauthoridGuo, CX=36777965500en_US
dc.identifier.scopusauthoridLee, CY=23067841900en_US
dc.identifier.scopusauthoridPeng, SM=35464852200en_US

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