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(Acetyl-acetonato-κO,O')chlorido-trimethano-latoniobium(V).

ABSTRACT: In the title compound, [Nb(CH(3)O)(3)(C(5)H(7)O(2))Cl], the Nb(V) atom is coordinated by two O atoms from the chelating acetyl-acetonate ligand, three O atoms from the methano-late groups and one chloride ligand. The octa-hedral environment around niobium is slightly distorted with Nb-O distances in the range 1.8603 (15)-2.1083 (15) Å and an Nb-Cl distance of 2.4693 (9) Å. The O-Nb-O angles vary between 80.74 (6) and 100.82 (7)°, while the trans Cl-Nb-O angle is 167.60 (5)°. There are no hydrogen bonds observed, only an inter-molecular C-H⋯O inter-action.

SUBMITTER: Herbst L

PROVIDER: S-EPMC3006950 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Tetra-ethyl-ammonium (acetyl-acetonato)bromidotricarbonyl-rhenate(I).

Project description:In the title compound, (C(8)H(20)N)[ReBr(C(5)H(7)O(2))(CO)(3)], the Re(I) atom in the rhenate anion is surrounded by three carbonyl ligands orientated in a facial arrangement, a bromide ligand and an acetyl-acetonate ligand, leading to a distorted octa-hedral ReC(3)BrO(2) coordination with a O-Re-O bite angle of 85.66?(7)°. An array of C-H?O and C-H?Br hydrogen-bonding inter-actions between the cations and the surrounding rhenate anions stabilize the crystal structure.

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Bis(acetyl-acetonato-?O,O')(pyridine-?N)zinc(II).

Project description:In the title compound, [Zn(C(5)H(7)O(2))(2)(C(5)H(5)N)], the metal atom has square-pyramidal coordination geometry with the basal plane defined by the four O atoms of the chelating acetyl-acetonate ligands and with the axial position occupied by the pyridine N atom. The crystal packing is characterized by a C-H?O hydrogen-bonded ribbon structure approximately parallel to [10[Formula: see text]].

| S-EPMC3120430 | biostudies-literature

Bis(acetyl-acetonato)oxido(triphenyl-phosphine oxide)vanadium(IV).

Project description:In the structure of the title compound, [V(C(5)H(7)O(2))(2)O(C(18)H(15)OP)], the V atom adopts a slightly distorted octa-hedral geometry with its coordination completed by four O atoms of two acetyl-acetonate (acac) ligands, one oxo group and one O atom of the triphenyl-phosphine oxide (OPPh(3)) ligand.

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(Benzoato-κO)chlorido[(-)-sparteine-κN,N']zinc(II).

Project description:The title complex, [Zn(C(7)H(5)O(2))Cl(C(15)H(26)N(2))], used for the magnetic dilution of the analogous Cu(II) complex, was synthesized through a direct synthesis route. The coordination geometry around Zn(II) is best described as distorted tetra-hedral, the largest deviation arising from the (-)-sparteine ligand, as is invariably found in complexes containing this rather rigid mol-ecule. The benzoate anion behaves as a monodentate ligand, with a non-coordinating Zn⋯O separation of 2.969 (5) Å. Mol-ecules are packed in the crystal without significant inter-molecular inter-actions. The shortest Zn⋯Zn separation [6.8186 (7) Å] is observed between mol-ecules related through the 2(1) screw axis. This is an important feature for the magnetic behaviour of the Cu(II) analogue, which is intended for modeling isolated metal centers in the active site of type 1 blue copper proteins.

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Bis(acetyl-acetonato-?O,O')-aqua-(diacetyl-methanido-?C)iridium(III).

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(Acetyl-acetonato-?(2)O,O')dichlorido-bis(methano-lato-?O)niobium(V).

Project description:In the title compound, [Nb(CH(3)O)(2)(C(5)H(7)O(2))Cl(2)], a slightly distorted octa-hedral coordination geometry is observed around the Nb(V) atom with Nb-O distances in the range of 1.8254?(16)-2.0892?(16)?Å and Nb-Cl distances of 2.3997?(14) and 2.4023?(12)?Å. The O-Nb-O angles vary between 81.36?(7) and 172.65?(7) °, while the trans Cl-Nb-Cl angle is 167.34?(2)°. There are no hydrogen bonds observed.

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Tetra-kis(1,1,1-trifluoro-acetyl-acetonato-?O,O')hafnium(IV) toluene disolvate.

Project description:In the title compound, [Hf(C(5)H(4)F(3)O(2))(4)]·2C(7)H(8), the Hf(IV) atom, lying on a twofold rotation axis, is coordinated by eight O atoms from four 1,1,1-trifluoro-acetyl-acetonate ligands with an average Hf-O distance of 2.173?(1)?Å and O-Hf-O bite angles of 75.69?(5) and 75.54?(5)°. The coordination polyhedron shows a slightly distorted Archimedean square antiprismatic geometry. The asymmetric unit contains a toluene solvent mol-ecule. The crystal structure involves C-H?.F hydrogen bonds.

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Tetra-kis(1,1,1-trifluoro-acetyl-acetonato-?O,O')zirconium(IV) toluene solvate.

Project description:In the title compound, [Zr(C(5)H(4)F(3)O(2))(4)]·C(7)H(8), the Zr atom is in a square-anti-prismatic coordination geometry that comprises four O,O'-bidentate trifluoro-acetyl-acetonate ligands. The O-Zr-O bite angles of the acetonate ligands range from 75.27?(5) to 75.41?(5)°. The Zr atom is located on a twofold rotation axis.

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