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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).

ABSTRACT: 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.

SUBMITTER: Chang JL

PROVIDER: S-EPMC3246937 | biostudies-literature |

REPOSITORIES: biostudies-literature

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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

Bis[bis-(2-ethyl-5-methyl-1H-imidazol-4-yl-κN)methane](nitrato-κO,O')nickel(II) nitrate.

Project description:In the title compound, [Ni(NO(3))(C(13)H(20)N(4))(2)]NO(3), the Ni(II) ion shows a distorted octa-hedral geometry formed by four N atoms from two bis-(2-ethyl-5-methyl-1H-imidazol-4-yl)methane ligands and two O atoms from a chelating nitrate anion. Three ethyl groups in the complex cation and the O atoms of the uncoordinated nitrate anion are disordered over two sets of positions [occupancy ratios of 0.52 (3):0.48 (3) and 0.63 (3):0.37 (3), respectively]. In the crystal, inter-molecular N-H⋯O hydrogen bonds connect the complex cations into a zigzag chain along [010] and further N-H⋯O hydrogen bonds between the chains and the uncoordinated nitrate anions lead to layers parallel to (100).

| S-EPMC3051755 | biostudies-literature

Bis(pentane-2,4-dionato)bis-[2-(4-pyrid-yl)-4,4,5,5-tetra-methyl-imidazoline-1-oxyl 3-oxide]nickel(II).

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.

| S-EPMC2961770 | biostudies-literature

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[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).

Project description: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].

| S-EPMC3515104 | 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

Aqua-bis(4-methyl-benzoato)-κO;κO,O'-bis-(pyridine-κN)nickel(II).

Project description:In the title mononuclear complex, [Ni(C(8)H(7)O(2))(2)(C(5)H(5)N)(2)(H(2)O)], the Ni(II) atom is in a distorted octa-hedral arrangement, coordinated by three carboxylate O atoms from one bidentate 4-methyl-benzoate ligand and one monodentate 4-methyl-benzoate ligand, two N atoms from pyridine ligands, axially positioned, and a water mol-ecule. The equatorially positioned water mol-ecule and uncoordinated carb-oxylate O atom form an intra-molecular hydrogen bond. An inter-molecular O-H⋯O hydrogen bond between the coordinated water mol-ecule and carboxylate O atom of the 4-methyl-benzoate ligand forms infinite chains along the b axis. These chains are connected by C-H⋯π inter-actions.

| S-EPMC2961051 | biostudies-literature

Dimethano-lbis[4,4,5,5-tetra-methyl-2-(5-methyl-imidazol-4-yl)-2-imidazoline-1-oxyl-3-oxide-?O,N]cobalt(II) diperchlorate.

Project description:In the mononuclear title complex, [Co(C(11)H(17)N(4)O(2))(2)(CH(3)OH)(2)](ClO(4))(2), the cobalt(II) atom lies on a symmetry centre and is coordinated by two O,N-bidentate ligands and two trans-arranged O atoms of the methanol mol-ecules in a slightly distorted octa-hedral geometry. In the crystal structure, cations and anions are linked by N-H?O and O-H?O hydrogen bonds into layers parallel to the bc plane.

| S-EPMC2980142 | biostudies-literature

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.

| S-EPMC2959951 | biostudies-literature

Aqua-bis(1H-imidazole-κN)bis-(4-methyl-benzoato)-κO;κO,O'-nickel(II).

Project description:In the mononuclear title compound, [Ni(C(8)H(7)O(2))(2)(C(3)H(4)N(2))(2)(H(2)O)], the Ni(II) atom is coordinated by three carboxylate O atoms (from a bidentate 4-methyl-benzoate ligand and a monodentate 4-methyl-benzoate ligand), two N atoms (from two imidazole ligands) and a water mol-ecule in an octa-hedral geometry. Inter-molecular O-H⋯O hydrogen-bonding inter-actions lead to infinite chains, which are further self-assembled into a supra-molecular network through inter-molecular N-H⋯O hydrogen-bonding inter-actions and π-π stacking [centroid-centroid distance = 3.717 (2) Å].

| S-EPMC2961080 | biostudies-literature

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