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{2,2'-[(2,2-Dimethyl-propane-1,3-di-yl)-bis-(nitrilo-methyl-idyne)]-diphenolato}-dioxidomolybdenum(VI).

ABSTRACT: In the structure of the title compound, [Mo(C(19)H(20)N(2)O(2))O(2)], the Mo atom exhibits oxidation state +VI and is surrounded by two O atoms and the tetra-dentate Schiff base ligand 2,2'-[(2,2-dimethyl-propane-1,3-di-yl)bis-(nitrilo-methyl-idyne)]diphenolate in a distorted octa-hedral configuration. An intra-molecular C-H⋯O hydrogen bond between a methyl-ene group and one O atom of the O=Mo(VI)=O unit, as well as additional inter-molecular hydrogen bonds between neighboring mol-ecules, lead to a weakly bonded inversion-symmetric dimeric structure.

SUBMITTER: Abbasi A

PROVIDER: S-EPMC2961957 | biostudies-literature | 2008 Jul

REPOSITORIES: biostudies-literature

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{2,2'-[(2,2-Dimethyl-propane-1,3-di-yl)-bis-(nitrilo-methyl-idyne)]-diphenolato}-dioxidomolybdenum(VI).

Abbasi Alireza A Sheikhshoaie Iran I Saghaei Abbas A Monadi Niaz N

Acta crystallographica. Section E, Structure reports online 20080719 Pt 8

In the structure of the title compound, [Mo(C(19)H(20)N(2)O(2))O(2)], the Mo atom exhibits oxidation state +VI and is surrounded by two O atoms and the tetra-dentate Schiff base ligand 2,2'-[(2,2-dimethyl-propane-1,3-di-yl)bis-(nitrilo-methyl-idyne)]diphenolate in a distorted octa-hedral configuration. An intra-molecular C-H⋯O hydrogen bond between a methyl-ene group and one O atom of the O=Mo(VI)=O unit, as well as additional inter-molecular hydrogen bonds between neighboring mol-ecules, lead t ...[more]

PMID: 21203027

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{1,1'-[(2,2-Dimethyl-propane-1,3-di-yl)bis-(nitrilo-methyl-idyne)]di-2-naphthol-ato}dioxidomolybdenum(VI) dichloro-methane 1.75-solvate.

Project description:In the crystal structure of the title compound, [Mo(C(27)H(24)N(2)O(2))O(2)]·1.75CH(2)Cl(2), the Mo(VI) ion is coordinated by two oxide O atoms and by two O and two N atoms of the tetra-dentate 1,1'-[(2,2-dimethyl-propane-1,3-di-yl)bis-(nitrilo-methyl-idyne)]di-2-naphtholate Schiff base ligand in a distorted octa-hedral configuration. The compound crystallizes with 1.75 mol-ecules of dichloro-methane per complex mol-ecule. In the crystal, symmetry-related mol-ecules are linked by a number of C-H⋯O inter-actions involving both the Schiff base ligand and the partly disordered dichloro-methane solvent mol-ecules, leading to the formation of a two-dimensional network extending parallel to (101).

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{2,2'-[(2,2-Dimethyl-propane-1,3-di-yl)bis-(nitrilo-methyl-idyne)]diphenolato}palladium(II) ethanol hemisolvate.

Project description:The asymmetric unit of the title complex, [Pd(C(19)H(20)N(2)O(2))]·0.5C(2)H(5)OH, contains two mol-ecules of a Pd(II) complex of a Schiff base ligand with an N(2)O(2) donor set and one ethanol mol-ecule. The Pd(II) centers are in distorted square-planar geometries with the N(2)O(2) donor atoms of the tetra-dentate Schiff base dianions. The ethanol mol-ecule takes part in an O-H⋯O hydrogen bond. In the crystal structure, mol-ecules are stacked approximately along the b-axis direction. The O atom and three H atoms of the solvent molecule are disordered over two positions; the site occupancy factors are ca 0.8 and 0.2.

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Project description:The structure of the title compound, [Fe(2)(C(17)H(16)N(2)O(2))(2)(OH)(2)]·2C(3)H(7)N, consists of centrosymmetric dimeric units in which crystallographically equivalent Fe(III) ions are doubly bridged by hydroxide groups. Each Fe(III) center in the complex has a six-coordinated distorted cis-FeN(2)O(4) octa-hedral geometry.

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{4,4'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenolato}nickel(II).

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Project description:In the title compound, [Mo(C(27)H(38)N(4)O(2))O(2)], the Mo(VI) atom is coordinated by two oxide O atoms and by two O and two N atoms of the tetra-dentate Schiff base ligand in a distorted octa-hedral geometry. The Mo-N bond trans to a terminal oxide group is significantly longer than the other Mo-N bond, which is attributed to the strong trans effect of the oxide O atom. The dihedral angle formed between the substituted benzene rings is 71.79?(14)°. One of the ethyl groups is disordered over two sets of sites, with a refined site-occupancy ratio of 0.588?(18):0.412?(18).

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{6,6'-Dieth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenolato}nickel(II) monohydrate.

Project description:In the title complex, [Ni(C(23)H(28)N(2)O(4))]·H(2)O, the Ni(II) ion is coordinated by the N(2)O(2) unit of the tetra-dentate Schiff base ligand in a slightly distorted planar geometry. The asymmetric unit of the title compound comprises one complex mol-ecule and a water mol-ecule of crystallization. The H atoms of the water mol-ecule make bifurcated inter-molecular hydrogen bonds with the O atoms of the phenolate and eth-oxy groups with R(1) (2)(5) and R(1) (2)(6) ring motifs, which may, in part, influence the mol-ecular configuration. The dihedral angle between the two benzene rings is 31.43 (5)°. The crystal structure is further stabilized by inter-molecular C-H⋯O and C-H⋯π inter-actions, which link neighbouring mol-ecules into one-dimensional extended chains along the a axis. An inter-esting feature of the crystal structure is the short inter-molecular C⋯C [3.3044 (14) Å] contact which is shorter than the sum of the van der Waals radii.

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{6,6'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenolato}nickel(II) 1.78-hydrate.

Project description:In the title complex, [Ni(C(21)H(24)N(2)O(4))]·1.78H(2)O, the Ni(II) ion has a slightly distorted planar geometry, coordinated by the two N and two O atoms of the tetra-dentate Schiff base ligand, with a mean deviation of 0.272 Å from the NiN(2)O(2) plane. The N and O donor atoms are mutually cis. The dihedral angle between two benzene rings of the ligand is 38.86 (8)°. There are also three solvent water mol-ecules, two of which lie across different crystallographic twofold rotation axes; one of these is partially occupied with a refined occupancy factor of 0.570 (7). The water mol-ecules are linked together as tetra-mers in R(2) (2)(8) ring motifs, which also connect two neighbouring mol-ecules of the complex through a network of O-H⋯O hydrogen bonds. The crystal structure is further stabilized by inter-molecular C-H⋯O and C-H⋯π inter-actions, which link neighbouring mol-ecules into extended chains along the b axis. Other inter-esting features of the crystal structure are the short inter-molecular C⋯C [3.204 (3)-3.365 (3) Å] and the C⋯O [3.199 (2)-3.205 (2) Å] contacts which are shorter than the sum of the van der Waals radii of these atoms.

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{4,4'-Dimethyl-2,2'-[(2,2-dimethyl-propane-1,3-di-yl)bis-(nitrilo-methanylyl-idene)]diphenolato}nickel(II) monohydrate.

Project description:In the title compound, [Ni(C(21)H(24)N(2)O(2))]·H(2)O, both the complex mol-ecule and the water mol-ecule lie on a twofold rotation axis. The Ni(II) ion is coordinated in a distorted square-planar geometry by the tetra-dentate ligand. The dihedral angle between the two symmetry-related benzene rings is 47.12?(8)°. In the crystal, pairs of symmetry-related O-H?O hydrogen bonds form R(2) (2)(6) ring motifs. In addition, there are weak inter-molecular C-H?O hydrogen bonds, and ?-? stacking inter-actions with a centroid-centroid distance of 3.4760?(8)?Å.

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{4,4',6,6'-Tetrachloro-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methanylyl-idene)]diphenolato}dioxidomolyb-denum(VI).

Project description:The asymmetric unit of the title compound, [Mo(C(19)H(16)Cl(4)N(2)O(2))O(2)], comprises two independent mol-ecules (A and B). The geometry around the Mo(VI) atom is distorted octa-hedral in each complex mol-ecule, supported by two oxide O atoms and the N(2)O(2) donor atoms of the coordinating ligand. The dihedral angle between the benzene rings is 74.96 (11) Å for mol-ecule A and 76.05 (11) Å for mol-ecule B. In the crystal, the B mol-ecules are linked by pairs of C-H⋯Cl hydrogen bonds, forming inversion dimers. The crystal structure is further stabilized by C-H⋯π inter-actions. An inter-esting feature of the crystal structure is a Cl⋯Cl contact [3.3748 (18) Å], which is shorter than the sum of the van der Waals radii of Cl atoms (3.50 Å).

| S-EPMC3470140 | biostudies-literature

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