Magnetic exchange in imidazolate-bridged copper(II) complexes

Kolks, Gary; Lippard, Stephen J.; Waszczak, J. V.; Lilienthal, H. R.

doi:10.1021/ja00367a014

Cited by 119 publications

(56 citation statements)

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“…From this data it is obvious that no simple magneto-structural correlation exists which is based on parameters relevant for the proposed σ and π exchange pathways. This immediately leads to the assumption, that J is also dependent on electronic factors of the bridging ligand [20]. This influence is obvious from the variation of the J values observed for different series of imidazolate, 2-methylimidazolate and benzimidazolate bridged dicopper(II) complexes (see Table 4).…”

Section: Magneto-structural Correlationssupporting

confidence: 45%

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Magnetic Interactions through Imidazolate-Bridges: Synthesis, Spectroscopy, Crystal Structure and Magnetic Properties of μ-Imidazolato-Bridged Copper(II) Complexes

Plass

Pohlmann

Subramanian

et al. 2002

Z. anorg. allg. Chem.

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The synthesis, characterization and crystal structures of substituted imidazolate bridged binuclear copper(II) complexes, [Cu 2 (dien) 2 (L)](ClO 4 ) 3 , where dien ϭ diethylenetriamine, L ϭ imidazolate (im Ϫ ) (1), 2-methylimidazolate (mim Ϫ ) (2) and benzimidazolate (bim Ϫ ) (3), are reported. The copper(II) ions of 1Ϫ3 posses a square planar coordination environment with dien coordinating as a tridentate ligand and the fourth position being occupied by a nitrogen atom of the bridging µ-imidazolato group. In all three compounds the tendency to form additional long apical bonds at the copper(II) ions to the oxygen atoms of the perchlorate anions is observed. Temperature depended susceptibility data of polycrys- Durch Imidazolat-Brücken vermittelte magnetische Wechselwirkungen: Synthese, Spektroskopie, Kristallstruktur und magnetische Eigenschaften von µ-imidazolato-verbrückten Kupfer(II) KomplexenInhaltsübersicht. Die Synthese, Charakterisierung und Kristallstrukturen von zweikernigen Kupfer(II)-Komplexen mit unterschiedlich substituierten Imidazolat-Brücken, [Cu 2 (dien) 2 (L)]-(ClO 4 ) 3 , mit dien ϭ Diethylentriamin, L ϭ Imidazolat (im Ϫ ) (1), 2-Methylimidazolat (mim Ϫ ) (2) und Benzimidazolat (bim Ϫ ) (3), werden beschrieben. Die Kupfer(II)-Ionen von 1Ϫ3 weisen eine quadratisch-planare Koordination, mit dien als dreizähnigem Liganden und der vierten Koordinationsstelle besetzt durch ein Stickstoffatom des verbrückenden µ-Imidazol-Moleküls. Für alle drei Verbindungen beobachtet man die Tendenz zur Ausbildung zusätz-licher langer axialer Bindungen der Kupfer(II)-Ionen zu Sauerstoffatomen der Perchlorat-Anionen. Die Temperaturabhängigkeit der

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Section: Magneto-structural Correlationssupporting

confidence: 45%

“…It can be expected that the molecular structure of the µ-imidazolato Table 4 and ref. [20]. bridged dicopper core is somewhat different in solution, due to crystal packing effects in the solid state.…”

Section: Magneto-structural Correlationsmentioning

confidence: 44%

Magnetic Interactions through Imidazolate-Bridges: Synthesis, Spectroscopy, Crystal Structure and Magnetic Properties of μ-Imidazolato-Bridged Copper(II) Complexes

Plass

Pohlmann

Subramanian

et al. 2002

Z. anorg. allg. Chem.

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“…Their SOD activities have also been investigated by various SOD assays. Imidazolate-bridged dicopper(II) complexes having open-chain and macrocyclic ligands [14][15][16][17][18][19] were investigated too. The syntheses and characterisation of imidazolate-bridged copper(II)-zinc(II) heterobinuclear complexes were of interest too, since the discovery of the imidazolate-bridged active centre in SOD enzymes.…”

Section: Introductionmentioning

confidence: 41%

Speciation study of an imidazolate-bridged copper(II)–zinc(II) complex in aqueous solution

Szilágyi

Labádi

Hernádi

et al. 2005

Journal of Inorganic Biochemistry

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“…The angles involving the nonbridging methyl groups, C3-Al1-C4, C7-Al2-C8, and C11-Al3-C12 (119.2(15), 116.8 (13), and 119.0(13)8, respectively), are considerably larger than the other C-Al-C angles. [19] The bridging Nd ± H distance can be estimated from the difference between NdÀC (2.77 ) [20] and ThÀC (2.83 ) [21] bond lengths in various Nd and Th cyclopentadienyl complexes, combined with the bridging Th ± H distance (2.29 ) in [{ThH 2 Cp* 2 } 2 ]. [21] This yields a value for Nd ± H bond distance of 2.23 .…”

mentioning

confidence: 44%