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Article: Crystal structures and magnetic properties of two alternating azide-bridged complexes [{M(dmbpy)(N3)2}n] (M = Mn or Cu; dmbpy = 4,4′-dimethyl-2,2′-bipyridine)

TitleCrystal structures and magnetic properties of two alternating azide-bridged complexes [{M(dmbpy)(N3)2}n] (M = Mn or Cu; dmbpy = 4,4′-dimethyl-2,2′-bipyridine)
Authors
Issue Date1999
Citation
Journal Of The Chemical Society - Dalton Transactions, 1999 n. 19, p. 3393-3398 How to Cite?
AbstractSingle crystals of complexes [{Mn(dmbpy)(N3)2}n] 1 and [{Cu(dmbpy)(N3)2}n] 2 (dmbpy = 4,4′-dimethyl-2,2′-bipyridine) were obtained from aqueous solutions containing 4,4′-dimethyl-2,2′-bipyridine, metal ions and sodium azide, and their structures determined by X-ray diffraction methods. The structure of 1 is a neutral two-dimensional network in which each MnII is bridged to three other metal ions through alternating single end-to-end and double end-on azido bridges. Compound 2 is a neutral chain in which the CuII is alternately bridged by double asymmetrical end-on and end-to-end azide groups. The magnetic properties of 1 and 2 have been investigated in the temperature range 5-300 K. Alternating ferro- and antiferro-magnetic interactions exist in the two compounds. A theoretical model has been developed for an S = 5/2 alternating ferromagnetic-antiferromagnetic coupled 2-D system: the exchange parameters obtained with this model are J/k = -7.7 K, zJ′/k = 2.5 K and g = 2.0 for 1. An S = 1/2 alternating ferromagnetic-antiferromagnetic coupled chain with the spin Hamiltonian H = -J1ΣS2i·S2i+1 - J2ΣS2i+1·S2i+2 leads to: J1/k = 11 K, J2/k = -87 K and g = 2.06 for 2. The natures and the magnitude of the alternating ferro- and antiferro-magnetic interactions in both compounds are discussed based on their structures. © The Royal Society of Chemistry 1999.
Persistent Identifierhttp://hdl.handle.net/10722/168056
ISSN
1999 Impact Factor: 2.31
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShen, Zen_US
dc.contributor.authorZuo, JLen_US
dc.contributor.authorYu, Zen_US
dc.contributor.authorZhang, Yen_US
dc.contributor.authorBai, JFen_US
dc.contributor.authorChe, CMen_US
dc.contributor.authorFun, HKen_US
dc.contributor.authorVittal, JJen_US
dc.contributor.authorYou, XZen_US
dc.date.accessioned2012-10-08T03:14:37Z-
dc.date.available2012-10-08T03:14:37Z-
dc.date.issued1999en_US
dc.identifier.citationJournal Of The Chemical Society - Dalton Transactions, 1999 n. 19, p. 3393-3398en_US
dc.identifier.issn0300-9246en_US
dc.identifier.urihttp://hdl.handle.net/10722/168056-
dc.description.abstractSingle crystals of complexes [{Mn(dmbpy)(N3)2}n] 1 and [{Cu(dmbpy)(N3)2}n] 2 (dmbpy = 4,4′-dimethyl-2,2′-bipyridine) were obtained from aqueous solutions containing 4,4′-dimethyl-2,2′-bipyridine, metal ions and sodium azide, and their structures determined by X-ray diffraction methods. The structure of 1 is a neutral two-dimensional network in which each MnII is bridged to three other metal ions through alternating single end-to-end and double end-on azido bridges. Compound 2 is a neutral chain in which the CuII is alternately bridged by double asymmetrical end-on and end-to-end azide groups. The magnetic properties of 1 and 2 have been investigated in the temperature range 5-300 K. Alternating ferro- and antiferro-magnetic interactions exist in the two compounds. A theoretical model has been developed for an S = 5/2 alternating ferromagnetic-antiferromagnetic coupled 2-D system: the exchange parameters obtained with this model are J/k = -7.7 K, zJ′/k = 2.5 K and g = 2.0 for 1. An S = 1/2 alternating ferromagnetic-antiferromagnetic coupled chain with the spin Hamiltonian H = -J1ΣS2i·S2i+1 - J2ΣS2i+1·S2i+2 leads to: J1/k = 11 K, J2/k = -87 K and g = 2.06 for 2. The natures and the magnitude of the alternating ferro- and antiferro-magnetic interactions in both compounds are discussed based on their structures. © The Royal Society of Chemistry 1999.en_US
dc.languageengen_US
dc.relation.ispartofJournal of the Chemical Society - Dalton Transactionsen_US
dc.titleCrystal structures and magnetic properties of two alternating azide-bridged complexes [{M(dmbpy)(N3)2}n] (M = Mn or Cu; dmbpy = 4,4′-dimethyl-2,2′-bipyridine)en_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/A903968F-
dc.identifier.scopuseid_2-s2.0-33749136877en_US
dc.identifier.hkuros53186-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33749136877&selection=ref&src=s&origin=recordpageen_US
dc.identifier.issue19en_US
dc.identifier.spage3393en_US
dc.identifier.epage3398en_US
dc.identifier.isiWOS:000082733200017-
dc.identifier.scopusauthoridShen, Z=13606179000en_US
dc.identifier.scopusauthoridZuo, JL=7202871908en_US
dc.identifier.scopusauthoridYu, Z=7404347413en_US
dc.identifier.scopusauthoridZhang, Y=7601334042en_US
dc.identifier.scopusauthoridBai, JF=7403129290en_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US
dc.identifier.scopusauthoridFun, HK=34975048300en_US
dc.identifier.scopusauthoridVittal, JJ=34868765600en_US
dc.identifier.scopusauthoridYou, XZ=36072101800en_US

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