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Di-μ-pivalato-κO,O':O';κO:O,O'-bis-[(methanol-κO)bis-(2,2,6,6-tetra-methylhepta-ne-3,5-dionato)praseo-dymium(III)].

ABSTRACT: In the centrosymmetric dimeric title compound, [Pr(2)(C(5)H(9)O(2))(2)(C(11)H(19)O(2))(4)(CH(3)OH)(2)], the two praseodymium(III) atoms are eight-coordinate and are bridged by O atoms from the two pivalate anions. Each Pr(III) ion is further coordinated by two chelating 2,2,6,6-tetra-methyl-3,5-hepta-nedionate (thd(-)) ligands and one methanol mol-ecule. The distance between the two Pr(III) ions is 4.273 (5) Å. Intra-molecular hydrogen bonds exists between the methanol hy-droxy group on one Pr(III) atom and a chelating O atom of a thd(-) ligand coordinated to the symmetry-related Pr(III) atom.

SUBMITTER: Meng Q

PROVIDER: S-EPMC3246944 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(1,10-Phenanthroline-?N,N')bis-(2,2,6,6-tetra-methyl-heptane-3,5-dionato-?O,O')nickel(II).

Project description:The title compound, [Ni(C(11)H(19)O(2))(2)(C(12)H(8)N(2))], was obtained from the reaction of bis-(2,2,6,6-tetra-methyl-heptane-3,5-dionato)nickel(II), [Ni(dpm)], and 1,10-phenanthroline (phen). The Ni(II) ion is coordinated by four O atoms from two dpm ligands and two N atoms from a phen ligand in a slightly distorted octa-hedral environment. The methyl C atoms of two of the tert-butyl groups are disordered over two sites, having approximate occupancies of 0.85 and 0.15 for the two components. In the crystal structure, there are no direction-specific inter-actions. Thermal studies showed that the title complex is stable to 623?K.

| S-EPMC2915153 | biostudies-literature

(μ-1,4,7,10-Tetra-oxacyclo-dodeca-ne)bis-[(1,4,7,10-tetra-oxacyclo-dodeca-ne)lithium] bis-(perchlorate).

Project description:12-Crown-4 ether (12C4) and LiClO(4) combine to form the ionic title compound, [Li(2)(C(8)H(16)O(4))(3)](ClO(4))(2), which is com-posed of discrete Li/12C4 cations and perchlorate anions. In the [Li(2)(12C4)(3)](2+) cation there are two peripheral 12C4 ligands, which each form four Li-O bonds with only one Li(+) atom. Additionally there is a central 12C4 in which diagonal O atoms form one Li-O bond each with both Li(+) atoms. Therefore each Li(+) atom is penta-coordinated in a distorted square-pyramidal geometry, forming four longer bonds to the O atoms on the peripheral 12C4 and one shorter bond to an O atom of the central 12C4. The cation occupies a crystallographic inversion centre located at the center of the ring of the central 12C4 ligand. The Li(+) atom lies above the cavity of the peripheral 12C4 by 0.815 (2) Å because it is too large to fit in the cavity.

| S-EPMC2983931 | biostudies-literature

Hexa-μ(2)-acetato-κO:O'-(azido-κN)bis-(methanol-κO)-μ(3)-oxido-trichromium(III) methanol monosolvate.

Project description:In the crystal structure of the title complex, [Cr(3)(CH(3)CO(2))(6)(N(3))O(CH(3)OH)(2)]·CH(3)OH, the trinuclear core has a central O atom; two methanol mol-ecules and an azide ion are coordinated to the Cr(III) atoms in the core. The three Cr(III) atoms form vertices of a nearly equilateral triangle. Each of the six acetate carboxyl-ate groups bridges a Cr-O-Cr fragment. In the crystal, the molecules inter-act with methanol solvent mol-ecules through O-H⋯O and O-H⋯N hydrogen bonds, forming a two-dimensional hydrogen-bonded network parallel to (100).

| S-EPMC3246918 | biostudies-literature

μ-2,3,5,6-Tetra-2-pyridylpyrazine-κN,N,N:κN,N,N-bis-[(methanol-κO)(nitrato-κO,O')(nitrato-κO)cadmium(II)].

Project description:The title complex, [Cd(2)(NO(3))(4)(C(24)H(16)N(6))(CH(4)O)(2)], displays a centrosymmetric dinuclear structure, in which the 2,3,5,6-tetra-2-pyridinylpyrazine (tppz) ligand links two Cd ions separated by 7.323 (4) Å. Each Cd(II) center is seven-coordinated by three N-atom donors of tppz in one plane, by two O atoms nearly normal to this plane, and by two O atoms 0.393 (3) and 0.488 (3) Å from that plane. The two Cd(II) ions are above and below the plane of the pyrazine ring of the tppz ligand, oriented with respect to the pyridine rings at dihedral angles of 38.01 (3) and 31.90 (3)°. The dihedral angle between the two pyridine rings is 41.11 (3)°. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules.

| S-EPMC2961967 | biostudies-literature

Tetra-kis(μ-phenoxy-acetato-κO:O')bis-[(1,10-phenanthroline-κN,N')manganese(II)] methanol hemisolvate.

Project description:The title complex, [Mn(2)(C(8)H(7)O(3))(4)(C(12)H(8)N(2))(2)]·0.5CH(3)OH, is a carboxyl-ate-bridged dinuclear Mn(II) complex with four phenoxy-acetate ions and two 1,10-phenanthroline mol-ecules as ligands. Each of the four phenoxy-acetate anions bridges the pair of Mn atoms. The asymmetric unit is completed by a half-occupancy methanol solvent mol-ecule. Face-to-face π-π stacking inter-actions between the aromatic rings of 1,10-phenanthroline molecules belonging to adjacent Mn(2) complexes, with an inter-planar separation of circa 3.4 Å, and weak C-H⋯O hydrogen bonds connect the dinuclear units into a three-dimensional supra-molecular framework.

| S-EPMC2915099 | biostudies-literature

Poly[bis-(methanol-κO)tris-(μ-pyrimidine-κN:N')tetra-kis(thio-cyanato-κN)dinickel(II)].

Project description:In the crystal structure of the title compound, [Ni(2)(NCS)(4)(C(4)H(4)N(2))(3)(CH(3)OH)(2)](n), each nickel(II) cation is coordinated by three N-bonded pyrimidine ligands, two N-bonded thio-cyanate anions and one O-bonded methanol mol-ecule in a distorted octa-hedral environment. The asymmetric unit consists of one nickel cation, two thio-cyanate anions and one methanol mol-ecule in general positions, as well as one pyrimidine ligand located around a twofold rotation axis. The crystal structure consists of μ-N:N' pyrimidine-bridged zigzag-like nickel thio-cyanate chains; these are further linked by μ-N:N-bridging pyrimidine ligands into layers which are stacked perpendicular to the b axis. The layers are connected via weak O-H⋯S hydrogen bonding.

| S-EPMC2968860 | biostudies-literature

Tetra-kis(μ-penta-fluoro-benzoato-κO:O')bis-[(tetra-hydro-furan-κO)molybdenum(II)].

Project description:In the asymmetric unit of the title compound, [Mo(2)(C(7)F(5)O(2))(4)(C(4)H(8)O)(2)], two independent half-mol-ecules are present, which are completed by a crystallographically imposed center of inversion between the individual Mo atoms. In each mol-ecule, four penta-fluoro-benzoate anions bridge the quadruply bonded Mo(2) (4+) unit that is, in addition, axially coordinated by two O atoms of tetra-hydro-furan (THF) mol-ecules. In the two independent mol-ecules, the mean Mo-Mo bond length is 2.110 Å. Since the THF mol-ecules are equally disordered over two sets of sites, there are four different Mo-O distances in both half-mol-ecules with an overall mean of 2.542 Å. A zigzag chain is formed by π-π stacking inter-actions between penta-fluoro-phenyl rings, indicated by a centroid-centroid distance of 3.7054 (11) Å and a centroid-to-plane distance of 3.4169 (3) Å. The extension of the unit gives a three-dimensional network structure with the THF mol-ecules located in the voids.

| S-EPMC3200930 | biostudies-literature

Tetra-μ-2-methyl-benzoato-κO:O'-bis-[(ethanol-κO)copper(II)].

Project description:In the title dinuclear complex, [Cu(2)(C(8)H(7)O(2))(4)(C(2)H(5)OH)(2)], four 2-methyl-benzoato anions form a cage around two Cu(II) ions in a syn-anti configuration. Two ethanol mol-ecules coordinate the Cu atoms in apical positions, giving an overall square-pyramidal coordination geometry. The Cu⋯Cu separation is 2.600 (1) Å. In the crystal, mol-ecules are assembled into chains extending in [001] through O-H⋯O hydrogen bonds.

| S-EPMC3246983 | biostudies-literature

Bis[μ-4-amino-3,5-bis-(hydroxy-meth-yl)-1,2,4-triazole]bis{bis-[4-amino-3,5-bis-(hydroxy-meth-yl)-1,2,4-triazole]nickel(II)} tetra-nitrate methanol disolvate.

Project description:The title complex, [Ni(2)(C(4)H(8)N(4)O(2))(6)](NO(3))(4)·2CH(4)O, contains a centrosymmetric binuclear nickel(II) complex bridged by a pair of 4-amino-3,5-bis-(hydroxy-meth-yl)-1,2,4-triazole ligands. The separation between the Ni(II) atoms is 3.962 (1) Å. The Ni atoms are in a slightly distorted octa-hedral coordination. Inter-molecular N-H⋯O, N-H⋯N and O-H⋯O hydrogen bonds connect the ligands, solvent mol-ecules and nitrate ions.

| S-EPMC2914969 | biostudies-literature

Bis(μ-4-phenyl-pyridine N-oxide-κO:O)bis-[bis-(1,1,1,5,5,5-hexa-fluoro-pentane-2,4-dionato)copper(II)].

Project description:The asymmetric unit of the title compound, [Cu(2)(C(5)HF(6)O(2))(4)(C(11)H(9)NO)(2)], contains one half of the centrosymmetric dinuclear complex. The coordination geometry of the Cu(II) atom is octa-hedral, exhibiting a typical Jahn-Teller distortion. One trifluoro-methyl group is rotationally disordered between two orientations in a 1:1 ratio.

| S-EPMC3006976 | biostudies-literature

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