Structures of four complexes of copper with N-methylimidazole and chloro ligands

Clegg, William; Nicholson, John; Collison, David; Garner, C. David

doi:10.1107/s0108270187011429

Cited by 31 publications

(27 citation statements)

References 12 publications

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“…Halogen atoms and polynitrogen heterocycles are particularly useful in this respect. It is known that the combination of Cu II salts with heterocyclic azole ligands leads to the formation of mononuclear, [2][3][4][5] polynuclear [6][7][8][9] and even polymeric [10][11][12][13][14][15] complexes. For the majority of polymeric complexes one or more of the bridges are N,NЈ-didentate divided.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropy of New Layered Copper(II) Bromide Complexes of 1‐Substituted Tetrazoles

et al. 2005

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Two new isostructural complexes, dibromobis(1‐ethyltetrazole)copper(II) (1) and dibromobis(1‐hexyltetrazole)copper(II) (2), have been synthesised. Each bromine atom in the crystal structure of 1 and 2 is bonded to two copper atoms to give rise to a polymeric corrugated network. The polymeric layers are distinctly separated by tetrazole ligands. Both solids exhibit a phase transition to the ferromagnetic state with Curie temperatures of 8.5 K and 8.9 K for 1 and 2, respectively, and a strong anisotropy of the magnetic susceptibility below the ordering temperature. The easy magnetisation axis lies along the monoclinic axis, and the hard magnetisation axis is orthogonal to the polymeric layers. Effective anisotropy fields were estimated as (720–3020 Oe). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropy of New Layered Copper(II) Bromide Complexes of 1‐Substituted Tetrazoles

et al. 2005

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“…Structural results are available for similar clusters containing pyridines (32,39), imidazoles (40)(41)(42) and other ligands (40, 43-45). Norillan and co-workers (40) (7) A, mean 1.998(6) A) suggest that azaindole has steric requirements similar to pyridines (meaa 1.98 A) (32,39) and greater than imidazoles (mean 1.94 A) (40,41).…”

Section: C1(3)cu(l)c1(2)cu(2)c1(3) Chain Ismentioning

confidence: 99%

Preparation and structure of chloro-copper(II) complexes of 7-azaindole

Poitras¹,

Beauchamp²

1992

Can. J. Chem.

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The light green trans-CuCl2(Haza)2 adduct precipitates immediately from mixtures of CuCl2•2H2O with excess 7-azaindole (Haza) in methanol. Upon standing in azaindole-rich solution, this solid is replaced by a deep green Cu2Cl4(Haza)6 compound, whose crystal structure (orthorbombic, Fdd2, a = 26.558, b = 23.750, c = 12.727 Ǻ, Z = 8, R = 0.068, Rw = 0.066) shows the presence of square-planar [Cu(Haza)4]2+ and trans-[CuCl2(Haza)2] units connected by bridging Cl− ions, making each Cu atom (4 + 2)-coordinated. Azaindole is bonded to the metal via the pyridine N7 site, whereas the five-membered ring retains its N1—H proton. The azaindole ligands are disordered over two orientations in the [CuCl2(Haza)2] unit. The square-planar Cu species and apical Cl− ions lie on a twofold axis and define along c an infinite chain based on the [Formula: see text] pattern. Equimolar mixtures of azaindole and CuCl2•2H2O yield a brown Cu4OCl6(Haza)4 compound. The crystal structure of its ethyl acetate solvate (monoclinic, P21/c, a = 11.661, b = 22.415, c = 15.077 Ǻ, β = 109.85°, Z = 4, R = 0.048, Rw = 0.054) shows the presence of a tetranuclear cluster consisting of a μ4-oxide ion surrounded by a tetrahedron of Cu(II) atoms bridged in pairs by chlorine atoms. The trigonal-bipyramidal coordination of each copper atom is completed by a monodentate N7-bonded azaindole molecule hydrogen bonded to bridging chlorines via N1—H. The influence of complexation on the infrared spectrum of azaindole is discussed.

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“…Strukturen von 3 a, 2 b und 4 a im Kristall. [6] [9] Während das trigonal-planare Anion [CuCl 3 ] 2À bekannt ist, [10] wurde das Anion [CuCl 2 ] À bisher nur als monomere Einheit [11] oder als Chlorid-verbrücktes Dimer ([ClCu(m-Cl) 2 CuCl] 2À ) [12] beschrieben. In kristallinem 5 a [6] [14] abgeleitet werden.…”

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Reaktionen von Triazacyclohexanen mit CuCl₂: ein Dimer aus zwei [CuCl₂]⁻‐Ionen mit Cu‐Cu‐Wechselwirkung

et al. 2003

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Structures of four complexes of copper with N-methylimidazole and chloro ligands

Cited by 31 publications

References 12 publications

Magnetic Anisotropy of New Layered Copper(II) Bromide Complexes of 1‐Substituted Tetrazoles

Magnetic Anisotropy of New Layered Copper(II) Bromide Complexes of 1‐Substituted Tetrazoles

Preparation and structure of chloro-copper(II) complexes of 7-azaindole

Reaktionen von Triazacyclohexanen mit CuCl₂: ein Dimer aus zwei [CuCl₂]⁻‐Ionen mit Cu‐Cu‐Wechselwirkung

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Structures of four complexes of copper with N-methylimidazole and chloro ligands

Cited by 31 publications

References 12 publications

Magnetic Anisotropy of New Layered Copper(II) Bromide Complexes of 1‐Substituted Tetrazoles

Magnetic Anisotropy of New Layered Copper(II) Bromide Complexes of 1‐Substituted Tetrazoles

Preparation and structure of chloro-copper(II) complexes of 7-azaindole

Reaktionen von Triazacyclohexanen mit CuCl2: ein Dimer aus zwei [CuCl2]−‐Ionen mit Cu‐Cu‐Wechselwirkung

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Reaktionen von Triazacyclohexanen mit CuCl₂: ein Dimer aus zwei [CuCl₂]⁻‐Ionen mit Cu‐Cu‐Wechselwirkung