Structures and magnetic properties of trinuclear copper(II) halide salts

Grigereit, T. E.; Ramakrishna, B. L.; Place, H.; Willett, Roger D.; Pellacani, Gian Carlo; Manfredini, Tiziano; Menabue, Ledi; Bonamartini-Corradi, Anna; Battaglia, L. P.

doi:10.1021/ic00261a015

Cited by 51 publications

(21 citation statements)

References 4 publications

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“…Unfortunately, the dependence of positions of ligand bonds in the electronic absorption spectra on the nature of H-bonds is not so evident, and no sufficient correlations were found. The same conclusion was made by Marcotrigiano and co-authors (Grigereit et al, 1987) with using IR spectroscopy data. The attempt to correlate the character of H-bonds in polycrystalline (H 2 L)CuBr 4 (L = 1-methylpyperazine; 2-methylpyperazine), as well as (HL) 2 CuBr 4 (L = 1-methylpyperazine) with the shift in ligand absorption bands in IR spectra of complexes with respect to those in corresponding hydrobromides also failed.…”

Section: Spectral-structural Correlationssupporting

confidence: 80%

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Features of Structure, Geometrical, and Spectral Characteristics of the (HL)2[CuX4] and (HL)2[Cu2X6] (X = Cl, Br) Complexes

Kovalchukova¹

2011

Current Trends in X-Ray Crystallography

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Section: Spectral-structural Correlationssupporting

confidence: 80%

“…Structure characteristics and properties of Cu 2 Cl 6 2-structures (Grigereit et al, 1987 . Symmetric dibridged structures of dimeric A 2 Cu 2 X 4 (X = Cl, Br) structures are based on u 2 X 6 2-dimers in one of the three mostly possible geometric configurations (Fig.…”

Section: Spectral-structural Correlationsmentioning

confidence: 99%

Features of Structure, Geometrical, and Spectral Characteristics of the (HL)2[CuX4] and (HL)2[Cu2X6] (X = Cl, Br) Complexes

Kovalchukova¹

2011

Current Trends in X-Ray Crystallography

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“…The general structure of the title material is unremarkable, with bond lengths and angles comparable with other structures containing the protonated moiety, where the anions are copper or palladium-based complex ions (Place & Willett, 1987b;Grigereit et al, 1987;Roman, Beitia & Luque, 1993). The bonds were slightly longer than those of the neutral compound (Espenbetov, Struchkov, Poplavskaya & Kurman-galieva, 1985), except for the Cll--N12 bond, which was slightly shorter (0.05 A).…”

Section: Fl)mentioning

confidence: 64%

2-Amino-3-methylpyridinium Bromide Monohydrate

Coffey¹,

Robinson²,

Turnbull³

1996

Acta Crystallogr C

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“…Salts of [CuCl,(H,O)]-are also known (25). A number of infinite one-dimensional structures resulting from stacking of higher chloro-Cu(I1) oligomers have also been described (20,26,27). Chains are known for CuC12L2 compounds with ligands L such as imidazoles (28) and pyridines (29).…”

Section: {Cu(3)-cu(2)-cu(l)-cu(l)-cu(2)-cu(3))cu(3)~~~mentioning

confidence: 99%

“…7 170(6) c (22) 5694 (8) c (23) 5467 (7) C (24) 7559 (9) c (25) 8947(10) c (26) 9807(7) N (27) 933 1(5) (328) 7920(6) c (29) 6964 ( unit. The asymmetric tris-copper segment is repeated by crystallographic inversion centres on Cu(l) and near Cu(3), generating the fivecopper basic pattern of the infinite chain.…”

Section: {Cu(3)-cu(2)-cu(l)-cu(l)-cu(2)-cu(3))cu(3)~~~mentioning

confidence: 99%

Preparation and structure of 7-azaindolium salts containing unusual chloro-copper(II) anionic units

Poitras¹,

Leduc²,

Beauchamp³

1993

Can. J. Chem.

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JACQUES POITRAS, MARTIN LEDUC, and ANDRE L. BEAUCHAMP. Can. J. Chem. 71, 549 (1993).Dark-red crystals of (H,a~a)~[Cu~Cl,,(H,0)~]Cl were obtained by addition of HC1 to equimola~ amounts of 7-azaindole (Haza) and CuC12. 2H,O in methanol. They were shown by X-ray diffraction (triclinic, P1, a = 9.396(1), b = 9.894(1), c = 15.958(1), A, a = 106.10(1)", (3 = 98.25(1)', y = 105.56(1)0,' Z = 1, R = 0.031) to contain infinite chains in which the basic [ C U~C~, , ( H~O )~] ' pattern is built up from ti-an~-CuCl~(H,O)~, [CuC13(H,0)]-, and dichlorobridged [cu,c~,]' species. In the idealized chain, these units occur in the 1 :2: 1 ratio, but disorder is present and some of the C U C~~( H~O )~ units are randomly replaced by [CuC13(H,0)]-. The Cu atoms have a roughly square-planar primary coordination, and connection along the chain is achieved by weaker apical Cu-CI bridging interactions. All azaindole molecules are present as uncoordinated N7-protonated monocations. A related (H2aza)3[Cu3Cl,(H20)3]Cl salt was obtained as a side-product of the reaction of 7-azaindole with excess CuCl,. 2H20 in methanol without acid. In these brown crystals (triclinic, P I , a = 9.308(1), b = 9.964(1), c = 19.212(4) A, a = 76.67(1)", P = 79.35(1)", y = 75.27(1)", Z = 2, R = 0.046), the [Cu6~1,,(H20)6]'-pattern of the chain contains the same three building units as above, but in the 2:2: 1 ratio. In both salts, the polymeric chloro-copper chains are parallel and separated by azaindolium cations stacked along the same direction. The structures are stabilized by networks of hydrogen bonds involving the azaindolium cations, the chlorine atoms, and water molecules in the chloro-copper chain, and a noncoordinated C1-ion. Most of the azaindolium cations are disordered. The influence of N7-protonation on the infrared spectrum of azaindole is discussed. La plupart des cations azaindolium sont dCsordonnCs. L'influence de la protonation en N7 sur le spectre infrarouge de l'azaindole est discutCe. IntroductionIn many of the complexes of 7-azaindole (Haza, Scheme 1) reported so far, the ligand monoanion plays a bridging role rn "7 PI similar to that of carboxylates in stabilizing dinuclear units. HFor instance, copper(I1) azaindolate has been found to con-SCHEME 1 tain discrete Cu,(aza), dimeric units with the "windmill" tetra(azaindolate)dimetal structure of cop~er(II) acetate (1).azaindole with copper(I1) chloride in methanol, under con-A similar bridging role has been observed in compounds with ditions that favored ligand binding in the neutral form. To several other metals (2-4). As Yet, midentate binding of the complete our survey of the CuC1,-azaindole system, some anionic form has been observed only in the [CH,Hg(aza)l experiments were run in slightly acidic solution, conditions molecule, which was recently s h~w n to exist as an N lthat were known to lead to N7-protonated azaindolium salts bonded monomer (4-6). Because azaindole is a much weaker with ZnC1, (7). This was intended to yield salts of simple acid, adduct formation with the neutral mol...

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Structures and magnetic properties of trinuclear copper(II) halide salts

Abstract: The crystal structures of a series of trinuclear copper(II) halide salts have been determined. These all contain pseudoplanar, symmetrically bibridged Cu3Xg2" (la) or Cu3X7L" (lb) anions.

Cited by 51 publications

References 4 publications

Features of Structure, Geometrical, and Spectral Characteristics of the (HL)2[CuX4] and (HL)2[Cu2X6] (X = Cl, Br) Complexes

Features of Structure, Geometrical, and Spectral Characteristics of the (HL)2[CuX4] and (HL)2[Cu2X6] (X = Cl, Br) Complexes

2-Amino-3-methylpyridinium Bromide Monohydrate

Preparation and structure of 7-azaindolium salts containing unusual chloro-copper(II) anionic units

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