The [Cu2(O2CMe)4(btd)2] complex as a bridging unit: preparation, characterisation, X-ray structure and magnetism of the 2D coordination polymer {[Cu6(O2CMe)8(OMe)4(btd)2]}n (btd=2,1,3-benzothiadiazole)

Skorda, Konstantina; Papaefstathìou, Giannis S.; Vafiadis, Anastasios P.; Lithoxoidou, Alexandra T.; Raptopoulou, Catherine P.; Terzis, Aris; Psycharis, Vassilis; Bakalbassis, Evangelos G.; Tangoulis, Vassilis; Perlepes, Spyros P.

doi:10.1016/s0020-1693(01)00594-1

Cited by 36 publications

(10 citation statements)

References 58 publications

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“…(2) Å).T he two copper atomsi n each dimericunitare separated by adistance of 2.6419(7) Å. This distance is similar to that found in [Cu 2 (Indo) 4 (DMF) 2 ] × 1.6DMF (2.630(1) Å) and other Cu carboxylate dimers [7,9] and slightly longer than that found in [Cu 2 (m-OAc) 4 …”

Section: Discussionsupporting

confidence: 75%

“…Thet itle crystal structure consists of molecules with two Cu atomsl inked by four cbag roups in af ashion similar to that of [Cu 2 (Indo) 4 (DMF) 2 ] × 1.6DMF [3] and the dinuclear structure of [Cu 2 (CH 3 COO) 4 (H 2 O) 2 ] [9][10][11]. ADMF molecule is bound trans to the Cu1-Cu1Avector on each of the Cu atoms, and afurther two DMF molecules are loosely held in the lattice.…”

Section: Discussionmentioning

confidence: 99%

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Crystal structure of tetrakis(μ-2-chlorobenzoato-O:O′)-bis(dimethylformamid)dicopper(II), Cu2(C3H7NO)2(C7H4ClO2)4

Niu¹,

Shan²,

Min³

2012

Zeitschrift Für Kristallographie - New Crystal Structures

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Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Crystal structure of tetrakis(μ-2-chlorobenzoato-O:O′)-bis(dimethylformamid)dicopper(II), Cu2(C3H7NO)2(C7H4ClO2)4

Niu¹,

Shan²,

Min³

2012

Zeitschrift Für Kristallographie - New Crystal Structures

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“…10, 11 In particular, various groups 8, 12 have investigated metallopolymeric networks derived from simple 2,1,3-benzothiadiazoles and Cu() salts. A study by Kaim et al 13 examined the properties of dinuclear molybdenum pentacarbonyl complexes bridged by 2,1,3-benzothiadiazole and 2,1,3-benzoselenadiazole rings.…”

Section: Introductionmentioning

confidence: 99%

Mono- and di-nuclear complexes of the ligands 3,4-di(2-pyridyl)-1,2,5-oxadiazole and 3,4-di(2-pyridyl)-1,2,5-thiadiazole; new bridges allowing unusually strong metal–metal interactions

Richardson

Steel

D’Alessandro

et al. 2002

J. Chem. Soc., Dalton Trans.

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The syntheses of two new ligands, 3,4-di(2-pyridyl)-1,2,5-oxadiazole (dpo) and 3,4-di(2-pyridyl)-1,2,5-thiadiazole (dpt), are described. Complexes with palladium and copper have seven-membered chelate rings with coordination through the two pyridine nitrogens, whereas in the silver nitrate complex of dpt the ligand acts as a bridge between metal centres. Studies of the mononuclear ruthenium complexes indicate five-membered chelate rings (involving donor nitrogen atoms from each of a pyridine ring and the oxadiazole or thiadiazole ring) and reveal that these ligands are very electron deficient and possess very low energy π* orbitals. Dinuclear ruthenium complexes have been prepared and the diastereoisomers separated and crystallographically characterised. Electrochemical studies of these complexes reveal remarkably strong metal-metal interactions, which also depend on the stereoisomeric form. Some heterodinuclear complexes have also been prepared.

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“…The analogous carboxylate complexes of other 3d-metals were prepared lately with using of steric effects of axial ligands: alphasubstituted pyridines (2-picoline, 2,6-lutidine, acridine or N,Ndimethylformamide) or cyclopentadienyl groups [4][5][6][7]. [7].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of tetra(3-carboxyl-2,2,5,5-tetramethylpyrrolidin-1-oxyl) bis(dimethyl fumarate) bicopper(II) complex, C21H37CuN3O7

Niu

Zheng²,

et al. 2013

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of material 4-oxo-2,2,6,6-tetramethylpiperdin-1-oxyl I can be conveniently obtained by procedures given in the literature [1].The reaction of I with concentrated hydrochloric acid gave the isolable intermediate l-hydroxy-4-oxo-2,2,6,6-tetramethylpiperidine hydrochloride II which then was brominated to the 3-bromo-l-hydroxy-4-oxo-2,2,6,6-tetramethylpiperidine derivative which, in turn, was converted in situ to the corresponding radical III by oxidation using sodium nitrite. Compound III (25 g, 0.1 mmol) was added, portionwise, to a stirred solution of sodium hydroxide (8 g, 0.2mol) in water (150 mL). The reaction mixture was stirred for 3 h at about 20°C, acidified with 6 mol/L aqueous HC1 solution to pH 2, and quickly extracted with chloroform (3´80 mL). The organic layer was dried with anhydrous magnesium sulfate. After removal of the solvent in a rotating evaporator, the residue was recrystallized from a mixture of chloroform and hexane (3/1, v/v) to give 14.8 g (79.5%) of the yellow product IV.A solution of HCTemPO (372 mg, 2 mmol) in water (10 mL) was dropped slowly into CuO (80 mg, 1 mmol) in water (5 mL). DiscussionThe study of transition metal complexes with four carboxylate bridges (so-called "paddle-wheel") was stimulated by the antiferromagnetic properties of binuclear cupric acetate hydrate due to spin-spin interaction through the bridging carboxylate groups without Cu-Cu bonding (Cu-Cu 2.64 Å) [2,3]. The analogous carboxylate complexes of other 3d-metals were prepared lately with using of steric effects of axial ligands: alphasubstituted pyridines (2-picoline, 2,6-lutidine, acridine or N,Ndimethylformamide) or cyclopentadienyl groups [4][5][6][7]. [7]. The coordination of each Cu(II) ion is a distorted tetragonal pyramid. The Addison's criterion, which is 1 for an ideal trigonal bipyramid and 0 for an ideal tetragonal pyramid, respectively [9], has a value of 0.016 for the title moiety. The longer (Cu1-O7 DMF = 2.125(2) Å) distance is viewed at the apical position. The Cu1 atom deviates by 0.2049 Å from the basal plane formed by the O1, O2, O3 and O4 atoms. A DMF molecule is bound trans to the Cu1-Cu1A vector on each of the Cu atoms, and a further two DMF molecules are loosely held in the lattice. These lattice DMF sites were highly mobile, and their sites were only partially occupied. During the data collection, some reductions in the intensities of the standard reflections were noted, and these are consistent with slow loss of these molecules of crystallization. The fused and conjugated five-membered rings are close to being planar (deviations less than 0.2339 Å), and the molecule makes no close contacts with other molecules in the structure. The two copper atoms in each dimeric unit are separated by a distance of

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The [Cu2(O2CMe)4(btd)2] complex as a bridging unit: preparation, characterisation, X-ray structure and magnetism of the 2D coordination polymer {[Cu6(O2CMe)8(OMe)4(btd)2]}n (btd=2,1,3-benzothiadiazole)

Cited by 36 publications

References 58 publications

Crystal structure of tetrakis(μ-2-chlorobenzoato-O:O′)-bis(dimethylformamid)dicopper(II), Cu2(C3H7NO)2(C7H4ClO2)4

Crystal structure of tetrakis(μ-2-chlorobenzoato-O:O′)-bis(dimethylformamid)dicopper(II), Cu2(C3H7NO)2(C7H4ClO2)4

Mono- and di-nuclear complexes of the ligands 3,4-di(2-pyridyl)-1,2,5-oxadiazole and 3,4-di(2-pyridyl)-1,2,5-thiadiazole; new bridges allowing unusually strong metal–metal interactions

Crystal structure of tetra(3-carboxyl-2,2,5,5-tetramethylpyrrolidin-1-oxyl) bis(dimethyl fumarate) bicopper(II) complex, C21H37CuN3O7

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