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Article: µ-η1:η1-N,N-Imidazolidine-bridged Dicopper (II/III) complexes of a new dinucleating µ-Bis(tetradentate) schiff base ligand: synthesis, structural characterization, 1H NMR spectroscopy, and magnetic coupling

Titleµ-η1:η1-N,N-Imidazolidine-bridged Dicopper (II/III) complexes of a new dinucleating µ-Bis(tetradentate) schiff base ligand: synthesis, structural characterization, 1H NMR spectroscopy, and magnetic coupling
Authors
KeywordsN,O ligand
Imidazolidine
Copper complexes
Magnetic properties
Issue Date2005
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.org
Citation
European Journal of Inorganic Chemistry, 2005, v. 2005 n. 12, p. 2526-2535 How to Cite?
AbstractThe copper coordination chemistry of a new imidazolidine-based doubly bridging μ-bis(tetradentate) ligand, H3mhbai is studied. A new family of pentacoordinate dinuclear complexes of formula [CuII2(-mhbai)(-X)]·2 H2O (1–4) [X = OAc, NO3, Cl, S2COMe], where H3mhbai stands for 2-(2-hydroxyphenyl)-1,3-bis[4-(2-hydroxyphenyl)-4-methyl-3-aza-but-3-enyl]-2-methyl-1,3-imidazolidine, were synthesized from the ligand, H3mhbai in air. The complex 1 was structurally characterized by X-ray crystallography. The μ-η1:η1-N,N'-imidazolidine bridging mode between two copper(ii) ions has been identified in this complex along with a nonhelical binding mode of the μ-bis(tetradentate) ligand. Variable temperature (2–300 K) magnetic susceptibility data of 1 show the presence of a weak antiferromagnetic exchange interaction between the two triply bridged magnetically isolated copper(ii) (S = 1/2) ions. The χmT values start to drop at temperature below 50 K, to reach a value of 0.55 cm3 K mol–1 at 2 K for a coupling constant value of J = –2.2 cm–1. The 1H NMR spectrum of the weakly coupled complex 1 shows a total of seventeen hyperfine shifted peaks, as expected from the idealized Cs symmetry of the compound, spread over a very large window of chemical shift, spanning about 130 ppm. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Persistent Identifierhttp://hdl.handle.net/10722/69072
ISSN
2015 Impact Factor: 2.686
2015 SCImago Journal Rankings: 1.018
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorBera, Men_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorAromi, Gen_HK
dc.contributor.authorRay, Den_HK
dc.date.accessioned2010-09-06T06:10:18Z-
dc.date.available2010-09-06T06:10:18Z-
dc.date.issued2005en_HK
dc.identifier.citationEuropean Journal of Inorganic Chemistry, 2005, v. 2005 n. 12, p. 2526-2535en_HK
dc.identifier.issn1434-1948en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69072-
dc.description.abstractThe copper coordination chemistry of a new imidazolidine-based doubly bridging μ-bis(tetradentate) ligand, H3mhbai is studied. A new family of pentacoordinate dinuclear complexes of formula [CuII2(-mhbai)(-X)]·2 H2O (1–4) [X = OAc, NO3, Cl, S2COMe], where H3mhbai stands for 2-(2-hydroxyphenyl)-1,3-bis[4-(2-hydroxyphenyl)-4-methyl-3-aza-but-3-enyl]-2-methyl-1,3-imidazolidine, were synthesized from the ligand, H3mhbai in air. The complex 1 was structurally characterized by X-ray crystallography. The μ-η1:η1-N,N'-imidazolidine bridging mode between two copper(ii) ions has been identified in this complex along with a nonhelical binding mode of the μ-bis(tetradentate) ligand. Variable temperature (2–300 K) magnetic susceptibility data of 1 show the presence of a weak antiferromagnetic exchange interaction between the two triply bridged magnetically isolated copper(ii) (S = 1/2) ions. The χmT values start to drop at temperature below 50 K, to reach a value of 0.55 cm3 K mol–1 at 2 K for a coupling constant value of J = –2.2 cm–1. The 1H NMR spectrum of the weakly coupled complex 1 shows a total of seventeen hyperfine shifted peaks, as expected from the idealized Cs symmetry of the compound, spread over a very large window of chemical shift, spanning about 130 ppm. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)-
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.orgen_HK
dc.relation.ispartofEuropean Journal of Inorganic Chemistryen_HK
dc.subjectN,O ligand-
dc.subjectImidazolidine-
dc.subjectCopper complexes-
dc.subjectMagnetic properties-
dc.titleµ-η1:η1-N,N-Imidazolidine-bridged Dicopper (II/III) complexes of a new dinucleating µ-Bis(tetradentate) schiff base ligand: synthesis, structural characterization, 1H NMR spectroscopy, and magnetic couplingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1434-1948&volume=&spage=2526&epage=2535&date=2005&atitle=m-h1:h1-N,N%27-Imidazolidine-bridged+Dicopper+(II/III)+complexes+of+a+new+dinucleating+m-Bis(tetradentate)+schiff+base+ligand:+synthesis,+structural+characterization,+1H+NMR+spectroscopy,+and+magnetic+couplingen_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.identifier.doi10.1002/ejic.200500084-
dc.identifier.scopuseid_2-s2.0-21244467138-
dc.identifier.hkuros101074en_HK
dc.identifier.volume2005-
dc.identifier.issue12-
dc.identifier.spage2526-
dc.identifier.epage2535-
dc.identifier.isiWOS:000230068200030-
dc.publisher.placeGermany-

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