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4,4,5,5-Tetra-methyl-2-(3,4,5-trimethoxy-phen-yl)imidazolidine-1-oxyl 3-oxide.

ABSTRACT: In the title nitronyl nitroxide radical compound, C(16)C(23)N(2)O(5), the imidazole and benzene rings are twisted with respect to each other, making a dihedral angle of 26.2 (4)°. The imidazole ring adopts a half-chair conformation. Weak C-H⋯π inter-actions are also found.

SUBMITTER: Wang HB

PROVIDER: S-EPMC2969929 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-(1H-Indol-3-yl)-4,4,5,5-tetra-methyl-imidazolidine-1-oxyl 3-oxide.

Project description:In the title compound, C(15)H(18)N(3)O(2), the plane of the indole ring system is twisted with respect to the plane of the nitronyl nitroxide moiety, exhibiting a dihedral angle of 21.61?(6)°. The crystal packing is stabilized by N-H?O hydrogen bonds and weak C-H?O inter-actions.

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4,4,5,5-Tetra-methyl-2-[4-(2-pyrid-yl)phen-yl]-3,4-dihydro-imidazole-1-oxyl-3-oxide.

Project description:In the title compound, C(18)H(20)N(3)O(2), the pyridine and phenyl rings are coplanar [dihedral angle = 3.5 (3)°]. The phenyl ring makes a dihedral angle of 29.6 (1)° with the imidazole ring. The crystal structure is stabilized by inter-molecular C-H⋯O hydrogen bonds.

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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.

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Project description:The title compound, C(18)H(15)OP·C(13)H(17)N(2)O(3), belongs to a series of mol-ecular systems based on triphenyl-phosphine oxide. The O atom of the oxide group acts as an acceptor for hydrogen bonds from -OH groups of the nitronyl nitroxide. The crystal structure is stabilized by O-H?O hydrogen bonds.

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2-[3-Hy-droxy-4-(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(5), the imidazoline ring displays a twisted conformation. The mean plane of the imidazoline ring makes a dihedral angle of 22.55?(5)° with the benzene ring. In the crystal, O-H?O and C-H?O hydrogen bonds link the mol-ecules into a layer parallel to the bc plane.

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2-[1-(4-Chloro-benzo-yl)pyrrolidin-2-yl]-4,4,5,5-tetra-methyl-4,5-dihydro-imidazole-1-oxyl-3-oxide.

Project description:In the title compound, C(18)H(23)ClN(3)O(3), the imidazole ring system has an envelope conformation, whereas the nitronyl nitroxide unit displays a half-chair or twisted conformation. In the crystal, C-H⋯O hydrogen bonds build up a three-dimensional network.

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4,4,5,5-Tetra-methyl-2-(4-pyridinio)-2-imidazoline-1-oxyl-3-oxide perchlorate.

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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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).

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4,4,5,5-Tetra-methyl-2-(4-pyridyl)-imidazolidin-1-oxyl-3-oxide trichloroacetic acid solvate.

Project description:In the title compound, C(12)H(16)N(3)O(2)·C(2)HCl(3)O(2), the imidazolidine ring adopts a twist conformation. The crystal structure is stabilized by inter-molecular O-H⋯N hydrogen bonds.

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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.

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