A tetranuclear cobalt(III) cluster with 2-(hydroxymethyl)pyridine ligands

Fang-Ming Wang,Yi-Zhi Li,Chang-Sheng Lu,Qing-Jin Meng

doi:10.1107/s1600536810015369

Fang-Ming Wang, Yi-Zhi Li + Show 2 more

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https://doi.org/10.1107/s1600536810015369

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Abstract

In the title compound, tetrakis[μ3-(2-pyridyl)methanolato]tetrakis[bromido(methanol)cobalt(III)] tetrabromide 2-(hydroxymethyl)pyridine tetrasolvate dihydrate, [Co4Br4(C6H6NO)4(CH3OH)4]Br4·4C6H7NO4·2H2O, the cation comprises a [Co4O4] cubane-type core ( symmetry). The four CoIII ions and bridging O atoms from four (2-pyridyl)methanolate anions are located at alternating vertices of the cube, with bromide ions and methanol ligands on the exterior of the core, completing a distorted octahedral geometry. The structure is stablized by intermolecular O—H⋯Br and O—H⋯O interactions.

Highlights

In the title compound, tetrakis[3-(2-pyridyl)methanolato]tetrakis[bromido(methanol)cobalt(III)] tetrabromide 2-(hydroxymethyl)pyridine tetrasolvate dihydrate, [Co4Br4(C6H6NO)4(CH3OH)4]Br4Á4C6H7NO4Á2H2O, the cation comprises a [Co4O4] cubane-type core (4 symmetry)
The four CoIII ions and bridging O atoms from four (2-pyridyl)methanolate anions are located at alternating vertices of the cube, with bromide ions and methanol ligands on the exterior of the core, completing a distorted octahedral geometry
The structure is stablized by intermolecular O—HÁ Á ÁBr and O—HÁ Á ÁO interactions

Summary

Bruker SMART APEX CCD areadetector diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2000) Tmin = 0.265, Tmax = 0.350. Refinement R[F 2 > 2(F 2)] = 0.052 wR(F 2) = 0.113 S = 0.99 4018 reflections 200 parameters H-atom parameters constrained. Ámax = 0.75 e A À3 Ámin = À0.56 e A À3 Absolute structure: Flack (1983), 1822 Friedel pairs Flack parameter: 0.025 (18). Tetrakis[3-(2-pyridyl)methanolato]tetrakis[bromido(methanol)cobalt(III)] tetrabromide 2-(hydroxymethyl)pyridine tetrasolvate dihydrate, [Co4Br4(C6H6NO)4(CH3OH)4]Br4Á4C6H7NO4Á2H2O, the cation comprises a [Co4O4] cubane-type core (4 symmetry). The four CoIII ions and bridging O atoms from four (2-pyridyl)methanolate anions are located at alternating vertices of the cube, with bromide ions and methanol ligands on the exterior of the core, completing a distorted octahedral geometry. The structure is stablized by intermolecular O—HÁ Á ÁBr and O—HÁ Á ÁO interactions

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