In the title compound, C(16)H(14)N(2)O(5), a non-merohedral twin, the dihedral angle between the mean planes of the two benzene rings is 4.0 (9)°. The ethyl group is disordered [0.643 (14) and 0.357 (14) occupancy]. The nitro group is twisted by 16.4 (4)° from the mean plane of the benzene ring and the mean plane of the carbonyl group is twisted from the mean planes of the two benzene rings by 4.5 (0) and 4.7 (9)°. An intra-molecular N-H⋯O hydrogen bond occurs. The crystal packing is stabilized by weak inter-molecular C-H⋯O hydrogen-bond inter-actions.
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http://dx.doi.org/10.1107/S1600536811002236 | DOI Listing |
A new triazole-based -heterocyclic carbene Ir cationic complex with a tetra-fluorido-borate counter-anion and hemi-solvating di-chloro-methane, [Ir(CH)(CHN)(CHP)]BF·0.5CHCl, has been synthesized and structurally characterized. There are two independent ion pairs in the asymmetric unit and one di-chloro-methane solvent mol-ecule per two ion pairs.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
August 2024
Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany.
The structures of seven gold(III) halide derivatives of general formula Au ( = methyl-pyridines or di-methyl-pyridines, = Cl or Br) are presented: tri-chlorido-(2-methyl-pyridine)-gold(III), [AuCl(CHN)], (as two polymorphs and ); tri-bromido-(2-methyl-pyridine)-gold(III), [AuBr(CHN)], ; tri-bromido-(3-methyl-pyridine)-gold(III), [AuBr(CHN)], ; tri-bromido-(2,4-di-meth-yl-pyridine)-gold(III), [AuBr(CHN)], ; tri-chlorido-(3,5-di-methylpyridine)-gold(III), [AuCl(CHN)], ; tri-bromido-(3,5-di-methyl-pyridine)-gold(III), [AuBr(CHN)], , and tri-chlorido-(2,6-di-methyl-pyridine)-gold(III), [AuCl(CHN)], . Additionally, the structure of , the 1:1 adduct of and , [AuBr(CHN)]·[AuBr(CHN)], is included. All the structures crystallize solvent-free, and all have ' = 1 except for and , which display crystallographic twofold rotation symmetry, and , which has ' = 2.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
April 2024
Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany.
The structure of the title compound, CHBrNO, contains two independent mol-ecules connected by hydrogen bonds of the type N-H⋯N≡C to form a dimer. The configuration at the exocyclic C=C double bond is . The mol-ecules are roughly planar except for the isopropyl groups.
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January 2023
Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA.
The structure of the title compound, CHNO, reported by Smalley [(2021). , 524-534] from powder diffraction data and N NMR spectroscopy, is confirmed using low-temperature data from a twinned crystal. The tautomer in the solid state is alloxazine (1-benzo[]pteridine-2,4-dione) rather than isoalloxazine (10-benzo[]pteridine-2,4-dione).
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October 2022
Centro Conjunto de Investigacion en Quimica Sustentable UAE-UNAM, Carretera Toluca-Atlacomulco, km 14.5, Toluca, Mexico, 50200, Mexico.
The title compound, CHNO·0.25HO, was synthesized from de-oxy-cholic acid followed by a protection, a Mitsonobu substitution, a Staudinger reduction, formation of an amide and final reduction in the lateral chain. The compound crystallizes in the 1 space group with four steroid mol-ecules and one water mol-ecule in the triclinic cell unit.
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