Structural characterization of di-.mu.-hydroxo-bis(N,N,N',N'-tetraethylethylenediamine)dicopper(II) perchlorate, [Cu(teen)OH]2(ClO4)2

Estes, Eva Dixon; Hatfield, William E.; Hodgson, Derek J.

doi:10.1021/ic50137a022

Cited by 84 publications

(41 citation statements)

References 25 publications

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“…The structures and magnetic properties of dinuclear copper(II) complexes with µ-alkoxo and/or µ-carboxylato bridges have been studied to determine the importance of orbital countercomplementarity in spin coupling via two different bridging groups [17], and among di-µ-hydroxo copper(II) dimers linear correlation between the Cu-O-Cu angle and the exchange parameter 2J has been reported [18,19]. 2,2Ј-bipyridine, 4,4Ј-bipyridine or 1,10-phenanthroline), strictly anionic ligands (e.g.…”

Section: Introductionsupporting

confidence: 74%

Weak Antiferromagnetism in Carboxylato Copper(II) Complexes of Bipyridines

Castiñeiras

Balboa

Bermejo

et al. 2002

Z. anorg. allg. Chem.

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Three new members of the copper/carboxylato/heterocyclic diimine family, namely [Cu(GLYO)(2,2Ј-bipy)] 2 · nH 2 O (n ϭ 4 (1) or 6 (2), H 2 GLYO ϭ glycolic acid, 2,2Ј-bipy ϭ 2,2Ј-bipyridine) and {[Cu(AcO) 2 (4,4Ј-bipy)] · 3H 2 O} n (3) (AcO ϭ acetato, 4,4Јbipy ϭ 4,4-bipyridine), have been synthesized and characterized by IR and electronic absorption spectroscopy, and the crystal structures have been determined by single crystal X-ray analysis. 1 and 2 are composed of discrete dinuclear units in which each Cu II atom is coordinated in a square pyramidal arrangement to the two nitrogen atoms of a bipyridine ligand, to bridging non-carboxy oxygen atoms belonging to two glycolato ligands, and to one of the carboxy oxygen atoms of one of these glycolato ligands. The Cu··Cu distance is 3.0666(5) Å . Compound 3 consists of linear chains of dinuclear units in which each Cu II is coordinated to one non-bridging monodentate acetato ligand, to two acetato ligands

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Section: Introductionsupporting

confidence: 74%

Weak Antiferromagnetism in Carboxylato Copper(II) Complexes of Bipyridines

Castiñeiras

Balboa

Bermejo

et al. 2002

Z. anorg. allg. Chem.

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“…max bc attributed to some copper-copper magnetic exchange interaction. Similar behaviour has been reported for other h;,droxv-bridged copper(ll) complexes (12,13). Structure 11 lind the presence of a magnetic exchange interaction may only be rigorously confirmed, however, by X-ray crystallographic and variable temperature magnetic studies.…”

Section: Nn'-polyalkylethylenediamine 2-(nn-dialkylamino-supporting

confidence: 69%

“…2,2'-Bipyridine, 1,10-phenanthroline, and N, N'-polyalkylethylenediamine, etc. form the related hydroxy-bridged copper complexes, [LCu(OH)2CuL]n+ (12,13).…”

Section: Discussionmentioning

confidence: 99%

Synthesis of copper(II) and nickel(II) triazacycloalkane complexes

Nonoyama

1976

Transition Met Chem

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“…Hydroxo-bridges in Cu(II) complexes are not rare. There are many l-hydroxo-Cu(II) 2 examples [39][40][41][42][43] with one or two hydroxo-links. The geometry around the two Cu(II) centers is not always the same in each complex, but typically the Cu-Cu distance is 2.8-3.1 Å and the bond angle at the OH À is 95-105°.…”

Section: Resultsmentioning

confidence: 99%

The rotating ring-disk electrochemistry of the copper(II) complex of thyrotropin-releasing hormone

Rong

Weber

2007

Journal of Electroanalytical Chemistry

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Thyrotropin-releasing Hormone (TRH) forms an electroactive Cu(II) complex in aqueous solution. Rotating ring-disk electrochemistry reveals oxidation at the disk electrode and reduction at the ring electrode. The plot of limiting current vs. square root of rotation frequency deviates from the Levich equation, indicating both preceding and following chemical reactions. The reaction following the oxidation is a multiple-electron ECE-type of process that has been seen before in Cu(II)-peptide electrochemistry. The preceding reaction is unusual. The deviation from diffusion-controlled behavior is more pronounced at higher initial concentration of Cu(II) and peptide. We propose that a non-electroactive dimer, Cu(II)(2)-TRH(2), is in a slow equilibrium with the electroactive Cu(II)-TRH. Simulation of the RRDE behavior of the postulated Cu(II)-TRH system has succeeded in matching experimental data. Capillary electrophoresis indicates that there is a negative charge on the dimer. It is suggested that a hydroxo-bridge may link the two Cu(II) centers. Calculations verify that bi-nuclear Cu(II)(2)-TRH(2) complexes are possible.

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Structural characterization of di-.mu.-hydroxo-bis(N,N,N',N'-tetraethylethylenediamine)dicopper(II) perchlorate, [Cu(teen)OH]2(ClO4)2

Abstract: Di-//-hydroxo-bis(MMA^',Ar'-tetraethylethylenediamine)dicopper(II) Perchlorate, [Cu(teen)0H]2(C104)2

Cited by 84 publications

References 25 publications

Weak Antiferromagnetism in Carboxylato Copper(II) Complexes of Bipyridines

Weak Antiferromagnetism in Carboxylato Copper(II) Complexes of Bipyridines

Synthesis of copper(II) and nickel(II) triazacycloalkane complexes

The rotating ring-disk electrochemistry of the copper(II) complex of thyrotropin-releasing hormone

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