247 research outputs found
N-Phenyl-tert-butanesulfinamide
No full textIn the racemic title compound, C10H15NOS, the packing exhibits centrosymmetric pairs of molecules linked by N—H...O=S hydrogen bonds in a head-to-tail fashion. The N—Caryl bond [1.4083 (12) Å] is considerably shorter than the N—Calkyl bonds typically found in N-alkylalkanesulfinamides (1.470–1.530 Å)
(4RS,5RS)-4-Phenyl-5-(4-tolylthiocarbonyl)-oxazolidin-2-one
No full textThe title compound, C17H15NO3S, is the product of an epoxidation reaction, followed by cyclization and hydrolysis of the resulting epoxide. There are two independent molecules in the asymmetric unit, both with a slightly twisted heterocyclic ring. N-H...O=C hydrogen bonds link the molecules together into centrosymmetric sets of four
(1′S,2R,3R)-3-(1′-terf-Butyldimethylsilyloxy-1′- phenylmethyl)-2-(4″-methylphenylthio)-2-nitrooxirane
No full textThe title compound, C22H29NO4SSi, displays an anomeric effect in the marked shortening of one C-O bond relative to the other in the oxirane ring, concomitantly weakening the C-S bond to the arylthio substituent. This correlates with the selective reactivity of nucleophiles at the C atom having the longer C-O bond. The absolute configuration has been determined from anomalous scattering effects. \ua9 2003 International Union of Crystallography Printed in Great Britain - all rights reserved
Tert-butyl (2S)-2-(9H-fluoren-9-ylmethoxy-carbonylamino)-3-(3′, 4′-dimethoxyphenyl)-propionate chloroform sesquisolvate
No full textThe title compound, C30H33NO6-1.5CHCl 3, a derivative of L-DOPA, forms chains in its crystal structure, via weak N - H⋯O=C hydrogen bonds involving the carbamate N - H and carbonyl groups of adjacent molecules, supported by N - H⋯O=C interactions of the same carbonyl. The staggered conformation about the C - C bond joining the dimethoxy-phenyl group to the chiral centre is similar to that in L-DOPA, but different from that in the iodo derivative from which the title compound was prepared. Extensive disorder of the chloroform solvent molecules, which could not be modelled by discrete atomic sites, prevents the confirmation of the absolute configuration of the main molecule on the basis of anomalous scattering effects of chlorine atoms, demonstrating a limitation of this otherwise useful technique. \ua9 2003 International Union of Crystallography Printed in Great Britain - all rights reserved
Oxalate complexes of the (η6-p-cymene)ruthenium(II) fragment: μ-oxalato-κ2O1,O2: κ2O1′,O2′- bis[(η6-p-cymene)(triphenylphosphine-κP)-ruthenium(II)] bis(tetrafluoroborate) and (η-p-cymene)
No full textThe crystal structure of dimeric μ-oxalato-bis[(η6-p- cymene)(triphenylphosphine)ruthenium(II)] bis(tetrafluoroborate), [Ru 2(C2O4)(C10H14) 2(C18H15P)2](BF4) 2, has the cation lying on an inversion centre. The complex demonstrates the trans bond-weakening influence, with the longest Ru-C(η6-p-cymene) bonds in the complex lying trans to the phosphine group. The related mononuclear species (η6-p-cymene) (oxalato)(pyridine-3,5-dicarboxylic acid)ruthenium(II), [Ru(C2O 4)(C10H14)(C7H5NO 4)], crystallizes as hydrogen-bonded tapes linked through O-H⋯O hydrogen bonds. \ua9 2006 International Union of Crystallography
(4RS,5RS)-4-Benzyl-5-(4-tolylthiocarbonyl)-oxazolidin-2-one
No full textThe title compound, C18H17NO3S, is the product of an epoxidation reaction, followed by cyclization and hydrolysis of the resulting epoxide. There are two independent molecules in the asymmetric unit; one has a slightly twisted heterocyclic ring, and the ring in the other is almost planar. Molecules form centrosymmetric pairs through N-H...O=C hydrogen bonds, involving the carbonyl group in the ring
(4S,5S)-4-Benzyl-2-oxooxazolidine-5-carboxylic acid
No full textIn the title compound, C11H11NO4, the five-membered ring has an envelope conformation. N-H...O and O-H...O hydrogen bonds link the molecules into chains
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