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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
Title | 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 |
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Authors | |
Keywords | N,O ligand Imidazolidine Copper complexes Magnetic properties |
Issue Date | 2005 |
Publisher | Wiley - 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/69072 |
ISSN | 2023 Impact Factor: 2.2 2023 SCImago Journal Rankings: 0.481 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Bera, M | en_HK |
dc.contributor.author | Wong, WT | en_HK |
dc.contributor.author | Aromi, G | en_HK |
dc.contributor.author | Ray, D | en_HK |
dc.date.accessioned | 2010-09-06T06:10:18Z | - |
dc.date.available | 2010-09-06T06:10:18Z | - |
dc.date.issued | 2005 | en_HK |
dc.identifier.citation | European Journal of Inorganic Chemistry, 2005, v. 2005 n. 12, p. 2526-2535 | en_HK |
dc.identifier.issn | 1434-1948 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/69072 | - |
dc.description.abstract | The 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.language | eng | en_HK |
dc.publisher | Wiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.eurjic.org | en_HK |
dc.relation.ispartof | European Journal of Inorganic Chemistry | en_HK |
dc.subject | N,O ligand | - |
dc.subject | Imidazolidine | - |
dc.subject | Copper complexes | - |
dc.subject | Magnetic properties | - |
dc.title | 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 | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+coupling | en_HK |
dc.identifier.email | Wong, WT: wtwong@hku.hk | en_HK |
dc.identifier.authority | Wong, WT=rp00811 | en_HK |
dc.identifier.doi | 10.1002/ejic.200500084 | - |
dc.identifier.scopus | eid_2-s2.0-21244467138 | - |
dc.identifier.hkuros | 101074 | en_HK |
dc.identifier.volume | 2005 | - |
dc.identifier.issue | 12 | - |
dc.identifier.spage | 2526 | - |
dc.identifier.epage | 2535 | - |
dc.identifier.isi | WOS:000230068200030 | - |
dc.publisher.place | Germany | - |
dc.identifier.issnl | 1434-1948 | - |