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Bis[4,4,5,5-tetra-methyl-2-(pyridin-2-yl-?(2)N)imidazoline-1-oxyl 3-oxide-?O]tris-(nitrato-?(2)O,O')terbium(III).

ABSTRACT: The title compound, [Tb(NO(3))(3)(C(12)H(16)N(3)O(2))(2)], was prepared from the nitroxide radical ligand 4,4,5,5-tetra-methyl--2-(pyridin-2-yl)-imidazoline-1-oxyl-3-oxide and Tb(III) nitrate. The Tb(III) ion adopts a doubly-capped square-anti-prismatic coord-ination environment defined by three chelating nitrate anions and two N,O-bidentate nitronyl nitroxide radical ligands. Weak C-H?O hydrogen bonds connect the molecules into a three-dimensional framework. The title structure is isotypic with the Ho analogue [Li (2012 ?). Acta Cryst. E68, 550].

SUBMITTER: Li DJ

PROVIDER: S-EPMC3515104 | biostudies-literature | 2012 Nov

REPOSITORIES: biostudies-literature

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Bis[4,4,5,5-tetra-methyl-2-(pyridin-2-yl-κ(2)N)imidazoline-1-oxyl 3-oxide-κO]tris-(nitrato-κ(2)O,O')terbium(III).

Li Dong-Jiao DJ

Acta crystallographica. Section E, Structure reports online 20121010 Pt 11

The title compound, [Tb(NO(3))(3)(C(12)H(16)N(3)O(2))(2)], was prepared from the nitroxide radical ligand 4,4,5,5-tetra-methyl--2-(pyridin-2-yl)-imidazoline-1-oxyl-3-oxide and Tb(III) nitrate. The Tb(III) ion adopts a doubly-capped square-anti-prismatic coord-ination environment defined by three chelating nitrate anions and two N,O-bidentate nitronyl nitroxide radical ligands. Weak C-H⋯O hydrogen bonds connect the molecules into a three-dimensional framework. The title structure is isotypic with ...[more]

PMID: 23284331

Similar Datasets

Tris-(nitrato-?(2)O,O')bis[4,4,5,5-tetra-methyl-2-(pyridin-2-yl-?N)imidazoline-1-oxyl 3-oxide-?O]holmium(III).

Project description:In the title compound, [Ho(NO(3))(3)(C(12)H(16)N(3)O(2))(2)], the Ho(III) ion is ten-coordinated in a distorted bicapped square-anti-prismatic environment by two N,O-bidentate nitronyl nitroxide radical ligands and three O,O'-bidentate nitrate anions. Complex mol-ecules are connected by C-H?O hydrogen bonds into a three-dimensional network.

| S-EPMC3344306 | biostudies-literature

Bis(nitrato-κO)bis-[4,4,5,5-tetra-methyl-2-(5-methyl-1H-imidazol-4-yl-κN)-2-imidazoline-1-oxyl 3-oxide-κO]nickel(II).

Project description:In the centrosymmetric mononuclear title complex, [Ni(NO(3))(2)(C(11)H(17)N(4)O(2))(2)], the Ni(II) atom displays a distorted octa-hedral coordination geometry and is six-coordinated by two N,O-bidentate nitronyl nitroxide radical ligands and two monodentate nitrate anions.

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Project description:In the title compound, [Ni(C(5)H(7)O(2))(2)(C(12)H(16)N(3)O(2))], the Ni(II) cation is hexa-coordinated by four O and two N atoms, showing a slightly distorted octa-hedral geometry. The Ni(II) cation lies on an inversion centre, as a consequence of which the asymmetric unit comprises one half-mol-ecule. The four O atoms belonging to two pentane-2,4-dionate ligands lie in the equatorial plane and two pyridyl N atoms occupy the axial coordination sites.

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Project description:The crystal structure of the title compound, C(12)H(17)N(3)O(2) (+)·ClO(4) (-), consists of 4,4,5,5-tetra-methyl-2-(4-pyridinio)imidazoline-1-oxyl-3-oxide radical cations and perchlorate anions. Both the cation and the Cl atom of the anion are located on the same twofold rotation axis, and the crystal structure shows the average structure for the radical cation. The five-membered ring assumes a half-chair conformation. The cation links with the anion via N-H⋯O hydrogen bonding.

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Bis[2,4-penta-nedionato(1-)]bis-[4,4,5,5-tetra-methyl--2-(4-pyrid-yl)-imidazoline-1-oxyl 3-oxide]manganese(II).

Project description:In the title compound, [Mn(C(5)H(7)O(2))(2)(C(12)H(16)N(3)O(2))], the manganese(II) cation (site symmetry ) is hexa-coordinated by four O and two N atoms in a distorted trans-MnN(2)O(4) octa-hedral geometry. The four O atoms belonging to two 2,4-penta-nedionate anions lie in the equatorial plane and the two N atoms occupy the axial coordination sites.

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Diaqua-bis-(benzoato-?O)bis-[4,4,5,5-tetra-methyl-2-(pyridin-4-yl-?N)imidazoline-1-oxyl 3-oxide]cobalt(II).

Project description:The title compound, [Co(C(7)H(5)O(2))(2)(C(12)H(16)N(3)O(2))(2)(H(2)O)(2)], was obtained from a conventional solvent evaporation method. The complex mol-ecule is centrosymmetric, so pairs of equivalent ligands lie trans to each other in a slightly distorted octa-hedral CoN(2)O(4) geometry. The Co(II) ion is coordinated by the pyridine N atoms from NITpPy ligands [NITpPy is 4,4,5,5-tetra-methyl-2-(pyridin-4-yl)imidazoline-1-oxyl 3-oxide), water O atoms and two monodentate benzoate O atoms. The complex mol-ecules are connected by O-H?O hydrogen bonds between water mol-ecules and benzoate ligands, forming chains parallel to [100]. ?-? stacking inter-actions between the benzoate ligands with centroid-centroid distances of 3.752?(2)?Å connect the chains into layers parallel to (10-1).

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Bis(pentane-2,4-dionato-κO,O')bis-[4,4,5,5-tetra-methyl-2-(4-pyridyl)-imidazoline-1-oxyl 3-oxide-κN]manganese(II).

Project description:The title compound, [Mn(C(5)H(7)O(2))(2)(C(12)H(16)N(3)O(2))(2)], is isostructural with its Ni(II)-containing analogue [Hao, Mu & Kong (2008 ▶). Acta Cryst. E64, m957]. The asymmetric unit comprises one-half of the mol-ecule and the Mn(II) ion is located on an inversion centre. The coordination geometry around the Mn(II) ion is slightly distorted octa-hedral, comprised of four O and two N atoms, in which the four O atoms in the equatorial plane come from two pentane-2,4-dionate ligands and the two N atoms in the axial coordination sites from 4,4,5,5-tetra-methyl-2-(4-pyrid-yl)imidazoline-1-oxyl 3-oxide.

| S-EPMC2961987 | biostudies-literature

2-[4-(2-Hy-droxy-eth-oxy)phenyl]-4,4,5,5-tetra-methyl-2-imidazoline-1-oxyl 3-oxide.

Project description:In the title compound, C(15)H(21)N(2)O(4), the imidazoline ring displays a twisted conformation. The dihedral angle between the mean plane of the imidazoline ring and the benzene ring is 33.50 (12)°. In the crystal, mol-ecules are connected by O-H⋯O hydrogen bonds, forming a zigzag chain along the c axis. The chains are linked by C-H⋯O and C-H⋯π inter-actions.

| S-EPMC3238993 | biostudies-literature

2-[2-(2-Hy-droxy-eth-oxy)phen-yl]-4,4,5,5-tetra-methyl-2-imidazoline-1-oxyl 3-oxide.

Project description:In the title compound, C(15)H(21)N(2)O(4), the nitronyl nitroxide unit displays a twisted conformation. The crystal structure is stabilized by non-classical C-H⋯O and C-H⋯π hydrogen bonds, which build up a three-dimensional network.

| S-EPMC3239125 | biostudies-literature

Dichloridobis[4,4,5,5-tetra-methyl-2-(5-methyl-1H-imidazol-4-yl-?N)-2-imidazoline-1-oxyl 3-oxide-?O]copper(II).

Project description:In the title complex, [CuCl(2)(C(11)H(17)N(4)O(2))(2)], the Cu(II) ion, lying on an inversion center, is six-coordinated in a distorted octa-hedral [Cu(N(2)O(2)Cl(2))] environment by two N,O-bidentate nitronyl nitroxide radical ligands and two trans-chloride anions. In the imidazoline-1-oxyl-3-oxide unit of the ligand, the four methyl groups and the C atoms to which they are bonded are disordered over two sets of sites, with a refined occupancy ratio of 0.737?(5):0.263?(5).

| S-EPMC3246935 | biostudies-literature

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