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Di-?-tert-butanolato-bis-[bis-(?-cyclo-penta-dien-yl)erbium(III)].

ABSTRACT: In the centrosymmetric title compound, [Er(2)(C(5)H(5))(4)(C(4)H(9)O)(2)], each Er atom is in a distorted tetra-hedral coordination environment, coordinated by two cyclo-penta-dienyl rings and two tert-but-oxy groups, forming a dimeric complex bridged through the tert-but-oxy groups.

SUBMITTER: Pagano S

PROVIDER: S-EPMC2960763 | biostudies-literature | 2008 Feb

REPOSITORIES: biostudies-literature

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Di-μ-tert-butanolato-bis-[bis-(η-cyclo-penta-dien-yl)erbium(III)].

Pagano Sandro S Schnick Wolfgang W

Acta crystallographica. Section E, Structure reports online 20080215 Pt 3

In the centrosymmetric title compound, [Er(2)(C(5)H(5))(4)(C(4)H(9)O)(2)], each Er atom is in a distorted tetra-hedral coordination environment, coordinated by two cyclo-penta-dienyl rings and two tert-but-oxy groups, forming a dimeric complex bridged through the tert-but-oxy groups. ...[more]

PMID: 21201862

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Bis[bis-(penta-methyl-cyclo-penta-dien-yl)cobalt(III)] tetra-chlorido-cobaltate(II) di-chloro-methane disolvate.

Project description:The title compound, [Co(C10H15)2]2[CoCl4]·2CH2Cl2, was isolated as a dichloromethane solvate and was formed in the reaction between lithium penta-methyl-cyclo-penta-dienide and anyhydrous cobalt(II) chloride in tetra-hydro-furan. There are two deca-methyl-cobaltocenium cations, one tetrachloridocobaltate(II) anion and two di-chloro-methane solvent mol-ecules in the formula unit. There is a slight disorder of the di-chloro-methane solvent which was treated with a two-site model [occupancy rates = 0.765?(4) and 0.235?(4)]. The di-chloro-methane mol-ecules display significant C-H?Cl inter-actions with the tetrachloridocobaltate(II) dianion. The cobalt atom of the deca-methyl-cobaltocenium cation sits on a twofold rotation axis, with only one penta-methyl-cyclo-penta-diene ligand being unique and the second generated by symmetry. The cobalt atom of the [CoCl4](-2) ion sits on a special site with -4 symmetry, with one unique chloride ligand and the others generated by the fourfold inversion axis.

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Di-μ-iodido-bis-[(diethyl ether-κO)(η-1,3-di-tert-butyl-cyclo-penta-dien-yl)ytterbium(II)].

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[?-1,3-Bis(trimethyl-sil-yl)cyclo-penta-dien-yl]dichlorido[?-(trimethyl-sil-yl)cyclo-penta-dien-yl]titanium(IV).

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Tris(?-cyclo-penta-dien-yl)hafnium(III).

Project description:In the crystal structure of the title compound, [Hf(C(5)H(5))(3)], three cyclo-penta-dienyl ligands surround the Hf(III) atom in a trigonal-planar geometry. The mol-ecule lies on a sixfold inversion axis.

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Iodidobis(?-penta-methyl-cyclo-penta-dien-yl)titanium(III).

Project description:In the title complex mol-ecule, [Ti(C(10)H(15))(2)I], the paramagnetic Ti(III) atom is coordinated by two penta-methyl-cyclo-penta-dienyl (Cp*) ligands and one iodide ligand. The two Cp* ligands are in a staggered orientation. The coordination geometry at the titanium atom can be described as distorted trigonal-planar.

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Crystal structure of di-n-but-yl-bis-(? (5)-penta-methyl-cyclo-penta-dien-yl)hafnium(IV).

Project description:The crystal structure of the title compound, [Hf(C10H15)2(C4H9)2], reveals two independent mol-ecules in the asymmetric unit. The diffraction experiment was performed with a racemically twinned crystal showing a 0.529?(5):0.471?(5) component ratio. Each Hf(IV) atom is coordinated by two penta-methyl-cyclo-penta-dienyl and two n-butyl ligands in a distorted tetra-hedral geometry, with the cyclo-penta-dienyl rings inclined to one another by 45.11?(15) and 45.37?(16)°. In contrast to the isostructural di(n-butyl)bis(? (5)-penta-methyl-cyclo-penta-dien-yl)zirconium(IV) complex with a noticeable difference in the Zr-butyl bonding, the Hf-Cbut-yl bond lengths differ from each other by no more than 0.039?(3)?Å.

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Bis(η-penta-methyl-cyclo-penta-dien-yl)cobalt(II).

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