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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.

ABSTRACT: 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.

SUBMITTER: Tian M

PROVIDER: S-EPMC3051528 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature

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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.

Tian Min M Xiang Zhuo Z Zhou Si-Yuan SY Jing Lin-Lin LL Wang Hai-Bo HB Sun Xiao-Li XL

Acta crystallographica. Section E, Structure reports online 20110115 Pt 2

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. ...[more]

PMID: 21523093

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(R)-2-[1-(2,6-Dichloro-3,4,5-trimeth-oxy-benzo-yl)pyrrolidin-2-yl]-4,4,5,5-tetra-methyl-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide.

Project description:In the title compound, C(21)H(28)Cl(2)N(3)O(6), the nitronyl nitroxide ring displays a half-chair conformation, whereas the pyrrolidine ring has an envelope conformation. These two rings are twisted to each other with N-C-C-N torsion angles around the connecting C-C bond of 48.9?(6) and -127.0?(5)°. The benzene ring is nearly perpendicular to the pyrrolidine ring, with torsion angles around the connecting C-C bond of 86.3?(6) and -97.7?(6)°. The crystal structure is stabilized by C-H?O and C-H?? hydrogen bonds, which build up a three-dimensional network.

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2-[1-(tert-But-oxy-carbonyl)-pyrrolidin-2-yl]-4,4,5,5-tetra-methyl-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide.

Project description:In the title compound, C(16)H(28)N(3)O(4), the plane of the pyrrolidine ring system is twisted with respect to the plane of the nitronyl nitroxide unit, making a dihedral angle of 79.80?(6)°. The crystal structure is stabilized by C-H?O hydrogen bonds.

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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-(3-Chloro-phen-yl)-4,5-dihydro-1H-imidazole.

Project description:In the title compound, C(9)H(9)ClN(2), a substituted imidazoline, the six- and five-membered rings are twisted from each other, making a dihedral angle of 17.07?(5)°. In the crystal structure, a short Cl?Cl [3.3540?(3)?Å] inter-action is observed. Neighbouring mol-ecules are linked together by inter-molecular N-H?N hydrogen bonds into a one-dimensional infinite chain along the [101] direction and short Cl?Cl contacts link the chains into a three-dimensional network. There is also a significant ?-stacking inter-action between the planar sections of the six- and five-membered rings.

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Methyl 2-{[2-(4,4,5,5-tetra-methyl-1,3-dioxyl-4,5-dihydro-imidazol-2-yl)phen-yl]-oxy}acetate.

Project description:In the title compound, C(16)H(21)N(2)O(5), the benzene ring is nearly perpendicular to the imidazole ring, making a torsion angle of 88.6?(8)°·The crystal structure is stabilized by non-classical C-H?O and C-H?? inter-actions, which build up a three-dimensional network.

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2-[4-(4,5-Dihydro-1H-pyrrol-2-yl)phen-yl]-4,5-dihydro-1H-imidazole.

Project description:The mol-ecule of the title compound, C(12)H(14)N(4), lies about a crystallographic inversion centre. The five- and six-membered rings are twisted from each other, forming a dihedral angle of 18.06 (7)°. In the crystal structure, neighbouring mol-ecules are linked by inter-molecular N-H⋯N hydrogen bonds into one-dimensional infinite chains forming 18-membered rings with R(2) (2)(18) motifs. The crystal structure is further stabilized by weak inter-molecular π-π stacking [centroid-centroid distance = 3.8254 (6) Å] and C-H⋯π inter-actions.

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

Project description: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.

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catena-Poly[[diaqua-cobalt(II)]bis-[?-2-(4-carboxyl-atophen-yl)-4,4,5,5-tetra-methyl-4,5-dihydro-1H-imidazol-1-oxyl 3-oxide]].

Project description:In the title compound, [Co(C(14)H(16)N(2)O(4))(2)(H(2)O)(2)](n), the Co(II) atom, lying on an inversion center, is coordinated by six O atoms in a distorted octa-hedral geometry. The Co(II) atoms are bridged by the nitronyl nitroxide ligands into a tape-like structure along the b axis. The tapes are further connected by O-H?O hydrogen bonds, forming a layer parallel to the bc plane.

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2-(4-Methoxy-phen-yl)-4,5-dihydro-1H-imidazole.

Project description:In the title mol-ecule, C(10)H(12)N(2)O, the dihedral angle between the benzene and imidazole rings is 14.86?(16)°. The approximately planar arrangement of the mol-ecule results in a distance of 2.54?Å between an ortho-H atom of the benzene ring and the double-bonded N atom of the imidazole ring. In the crystal structure, symmetry-related mol-ecules are linked by inter-molecular N-H?N hydrogen bonds into one-dimensional chains extending along the a axis.

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