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Article: Synthesis, characterization, and single-molecule metamagnetism of new Co(ii) polynuclear complexes of pyridine-2-ylmethanol

TitleSynthesis, characterization, and single-molecule metamagnetism of new Co(ii) polynuclear complexes of pyridine-2-ylmethanol
Authors
Issue Date2011
Citation
Dalton Transactions, 2011, v. 40, n. 40, p. 10526-10534 How to Cite?
AbstractThe reaction between pyridine-2-ylmethanol (HL), anhydrous CoCl2 and NaH afforded polynuclear Co(ii) complexes [Co7(L) 12]Cl2 (1), [Co6Na(L)12]Cl (2) and [Co4Cl2(L)6] (3), depending on the HL:CoCl 2 ratio set in the reaction. The core structures of the centrosymmetric complexes 1 and 2 are of the M@Co6 type (M = Co or Na, respectively) with a coplanar arrangement of the metals whereas that of centrosymmetric 3 is of an incomplete dicubane type. The experimental conditions allowing interconversions between these polynuclear complexes have been determined, which provides a more rational control of their synthesis. Thus, 1 transforms to 3 when reacted with CoCl2 in a 1:1 ratio, whereas the same reaction performed with a large excess of CoCl2 gave the tetranuclear pseudo-cubane complex [Co4(L)4Cl 2(MeOH)4] upon recrystallization. Conversely, 1 was isolated from the reaction of 3 with HL and NaH. The crystal structure of these compounds is reported, along with the magnetic behaviour of 1 and 3. The analysis of the magnetism using the effective spin-1/2 Hamiltonian approach revealed single-molecule metamagnetic behavior in 3. © 2011 The Royal Society of Chemistry.
Persistent Identifierhttp://hdl.handle.net/10722/219658
ISSN
2015 Impact Factor: 4.177
2015 SCImago Journal Rankings: 1.404

 

DC FieldValueLanguage
dc.contributor.authorPattacini, Roberto-
dc.contributor.authorTeo, Peili-
dc.contributor.authorZhang, Jun-
dc.contributor.authorLan, Yanhua-
dc.contributor.authorPowell, Annie K.-
dc.contributor.authorNehrkorn, Joscha-
dc.contributor.authorWaldmann, Oliver-
dc.contributor.authorHor, T. S Andy-
dc.contributor.authorBraunstein, Pierre-
dc.date.accessioned2015-09-23T02:57:39Z-
dc.date.available2015-09-23T02:57:39Z-
dc.date.issued2011-
dc.identifier.citationDalton Transactions, 2011, v. 40, n. 40, p. 10526-10534-
dc.identifier.issn1477-9226-
dc.identifier.urihttp://hdl.handle.net/10722/219658-
dc.description.abstractThe reaction between pyridine-2-ylmethanol (HL), anhydrous CoCl2 and NaH afforded polynuclear Co(ii) complexes [Co7(L) 12]Cl2 (1), [Co6Na(L)12]Cl (2) and [Co4Cl2(L)6] (3), depending on the HL:CoCl 2 ratio set in the reaction. The core structures of the centrosymmetric complexes 1 and 2 are of the M@Co6 type (M = Co or Na, respectively) with a coplanar arrangement of the metals whereas that of centrosymmetric 3 is of an incomplete dicubane type. The experimental conditions allowing interconversions between these polynuclear complexes have been determined, which provides a more rational control of their synthesis. Thus, 1 transforms to 3 when reacted with CoCl2 in a 1:1 ratio, whereas the same reaction performed with a large excess of CoCl2 gave the tetranuclear pseudo-cubane complex [Co4(L)4Cl 2(MeOH)4] upon recrystallization. Conversely, 1 was isolated from the reaction of 3 with HL and NaH. The crystal structure of these compounds is reported, along with the magnetic behaviour of 1 and 3. The analysis of the magnetism using the effective spin-1/2 Hamiltonian approach revealed single-molecule metamagnetic behavior in 3. © 2011 The Royal Society of Chemistry.-
dc.languageeng-
dc.relation.ispartofDalton Transactions-
dc.titleSynthesis, characterization, and single-molecule metamagnetism of new Co(ii) polynuclear complexes of pyridine-2-ylmethanol-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1039/c1dt10631g-
dc.identifier.scopuseid_2-s2.0-80053545687-
dc.identifier.volume40-
dc.identifier.issue40-
dc.identifier.spage10526-
dc.identifier.epage10534-
dc.identifier.eissn1477-9234-

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