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Di-μ-oxido-bis-({2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphen-olato}titanium(IV)) chloro-form disolvate.

ABSTRACT: In the title structure, [Ti2(C16H16N2O2)2O2]·2CHCl3, the Ti atom is coordinated in a distorted octa-hedral geometry by the O,N,N',O' donor set of the salalen ligand and by two μ2-oxide O atoms, which bridge two Ti(salalen) fragments into a centrosymmetric dimeric unit. In the central Ti2(μ2-O)2 fragment, the metal-oxygen distances are significantly different [1.7962 (19) and 1.9292 (19) Å]. In the crystal, the chloro-form mol-ecule is anchored via an N-H⋯Cl and a bifurcated C-H⋯(O,O) hydrogen bond. Slipped π-π stacking [shortest C⋯C distance = 3.585 (4) Å] and C-H⋯π inter-actions contribute to the coherence of the structure.

SUBMITTER: Zaitsev KV

PROVIDER: S-EPMC3884980 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Di-?-oxido-bis-({2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenolato}titanium(IV)) chloro-form disolvate.

Project description:In the title compound, [Ti2(C16H14N2O2)2O2]·2CHCl3, the Ti(IV) atom in the centrosymmetric complex has a distorted octa-hedral N2O4 coordination environment and is linked via two ?2-oxido bridges into a dinuclear centrosymmetric com-plex, with a Ti?Ti separation of 2.7794?(8)?Å. In the salen (N,N'-ethyl-enebis(salicyl-imine)) ligand, the two salicyl-imine units make a dihedral angle of 45.31?(5)°. The complex mol-ecules are stacked parallel to [100], forming channels in which the solvent chloro-form mol-ecules are located. C-H?O hydrogen-bonding inter-actions between the complex mol-ecules and the solvent mol-ecules consolidate the crystal packing.

| S-EPMC3884274 | biostudies-literature

Aqua-{6,6'-dieth-oxy-2,2'-[ethane-1,2-diyl-bis(nitrilo-methanylyl-idene)]diphen-olato}zinc.

Project description:The mononuclear zinc title complex, [Zn(C(20)H(22)N(2)O(4))(H(2)O)], was obtained by the reaction of 3-eth-oxy-salicyl-aldehyde, ethane-1,2-diamine, and zinc acetate in methanol. The Zn atom is five-coordinated by two phenolate O and two imine N atoms of the tetradentate Schiff base ligand and by one water O atom, forming a square-pyramidal geometry. In the crystal, pairs of mol-ecules are linked via inter-molecular O-H⋯O hydrogen bonds, forming dimers.

| S-EPMC3200652 | biostudies-literature

Acetato(aqua){6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenolato}cobalt(III) methanol disolvate.

Project description:In the title complex, [Co(C(18)H(18)N(2)O(4))(C(2)H(3)O(2))(H(2)O)]·2CH(3)OH, the Co(III) atom is hexa-coordinated by water and acetate groups in the axial positions and by the tetra-dentate Schiff base occupying equatorial positions. These axial bonds are longer than the equatorial bonds to the tetra-dentate Schiff base. Two mol-ecules form a dimer through strong hydrogen bonds from the coordinated water of one mol-ecule to the meth-oxy O atoms of an adjoining mol-ecule. There is extensive intra- and inter-molecular O-H?O hydrogen bonding between the coordinated water and acetate ligands and the methanol solvent mol-ecules. In addition, there are weak inter-molecular C-H?O inter-actions, which link the mol-ecules into a three-dimensional array.

| S-EPMC3393214 | biostudies-literature

4,4',6,6'-Tetra-bromo-2,2'-[(E,E)-ethane-1,2-diylbis(nitrilo-methanylyl-idene)]di-phenol.

Project description:The asymmetric unit of the title compound, C(16)H(12)Br(4)N(2)O(2), comprises half of a potential tetra-dentate Schiff base ligand. The whole mol-ecule is generated by an inversion center located in the middle of the C-C bond of the ethyl-ene segment. There are intra-molecular O-H?N hydrogen bonds making S(6) ring motifs. In the crystal, no significant inter-molecular inter-actions are observed.

| S-EPMC3414283 | biostudies-literature

2,2'-[Naphthalene-1,5-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(24)H(18)N(2)O(2), lies about an inversion centre and the asymmetric unit contains one half-mol-ecule. An intra-molecular O-H?N hydrogen bond generates a six-membered ring, producing an S(6) ring motif. The crystal packing exhibits inter-molecular ?-? stacking inter-actions between the aromatic rings with a centroid-centroid distance of 3.851?(2)?Å.

| S-EPMC3152037 | biostudies-literature

{6,6'-Dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenolato}nickel(II) dimethyl-formamide monosolvate.

Project description:In the title compound, [Ni(C(18)H(18)N(2)O(4))]·C(3)H(7)NO, the central Ni(II) atom is in a square-planar O(2)N(2) coordination environment. The planar Ni-salen moieties (r.m.s. deviation for the plane through the conjugated part of the Ni-salen group = 0.07 Å) form parallel stacks in the a-axis direction, with alternating Ni⋯Ni separations of 3.5339 (7) and 3.6165 (7) Å. In the crystal, there are weak inter-molecular C-H⋯O inter-actions involving the dimethyl-formamide O and phenolate O atoms.

| S-EPMC3051997 | biostudies-literature

μ-Oxido-bis-({4,4'-dibromo-2,2'-ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolato}iron(III)).

Project description:In the title compound, [Fe(2)(C(16)H(12)Br(2)N(2)O(2))(2)O], the complete mol-ecule is generated by twofold symmetry, with the bridging O atom, which links the iron centres, lying on the roatation rotation axis. The Fe(III) ion is chelated by the N,N,O,O-tetra-dentate Schiff base dianion, resulting in an FeN(2)O(3) square-based pyramid, with the two N atoms in the basal plane.

| S-EPMC2914945 | biostudies-literature

4,4'-Dibromo-2,2'-[octane-1,8-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(22)H(26)Br(2)N(2)O(2), has a centre of inversion that is located in the middle of the octyl chain; the chain displays an extended zigzag conformation. A short intra-molecular O-H⋯N hydrogen bond occurs.

| S-EPMC3200938 | biostudies-literature

4,4'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:In the title compound, C(21)H(26)N(2)O(4), the dihedral angle between the substituted benzene rings is 30.47 (15) °. Two strong intra-molecular O-H⋯N hydrogen bonds generate two S(6) ring motifs.

| S-EPMC3052006 | biostudies-literature

6,6'-Dieth-oxy-2,2'-[hexane-1,6-diylbis(nitrilo-methanylyl-idene)]diphenol.

Project description:The title compound, C(24)H(32)N(2)O(4), is a polydentate Schiff base and reveals strong intra-molecular O-H?N hydrogen bonding between the hy-droxy O atom and the imino N atom, with an O?N distance of 2.570?(3)?Å. In the crystal, a centre of inversion is located at the mid-point of the compound. The diimino-hexyl-ene chain is almost ideally in the anti conformation, with an average dihedral angle of 179.0°.

| S-EPMC3099770 | biostudies-literature

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