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1.  Dimethyl 3,3′-(phenyl­methyl­ene)bis­(1H-indole-2-carboxyl­ate) 
In the title compound, C27H22N2O4, the two indole ring systems are approximately perpendicular to each other, with a dihedral angle of 84.5 (5)° between their planes; the benzene ring is twisted with respect to the two indole ring systems at angles of 78.5 (5) and 86.5 (3)°. In the crystal, mol­ecules are linked by N—H⋯O hydrogen bonds, weak C—H⋯O and C—H⋯N hydrogen bonds, and C—H⋯π inter­actions into a three-dimensional supra­molecular architecture.
doi:10.1107/S1600536813024471
PMCID: PMC3790385  PMID: 24098207
2.  N-[(2S)-2-Chloro­propano­yl]glycine 
The title compound, C5H8ClNO3, was prepared by the nucleophilic substitution reaction of (2S)-2-chloro­propanoyl chloride with glycine. The acetate group forms a dihedral angle of 84.6 (1)° with the mean plane of the C—NH—C=O fragment. In the crystal, the molecules are linked by N—H⋯O and O—H⋯O hydrogen bonds, generating a three-dimensional network, which consolidates the crystal packing.
doi:10.1107/S1600536812036720
PMCID: PMC3435838  PMID: 22969684
3.  Diethyl 3,3′-(phenyl­methyl­ene)bis­(1H-indole-2-carboxyl­ate) 
In the title compound, C29H26N2O4, the benzene ring is twisted by 73.5 (5) and 84.9 (3)° with respect to the mean planes of the two indole ring systems; the mean planes of the indole ring systems are oriented at a dihedral angle of 82.0 (5)°. In the crystal, mol­ecules are linked by pairs of N—H⋯O hydrogen bonds into chains.
doi:10.1107/S1600536812036239
PMCID: PMC3435799  PMID: 22969645
4.  Ethyl 8-chloro-1-cyclo­propyl-6,7-difluoro-4-oxo-1,4-dihydro­quinoline-3-carboxyl­ate 
In the mol­ecule of the title compound, C15H12ClF2NO3, the quinoline ring system is not planar, the dihedral angle between the pyridine and benzene rings being 3.55 (8)°. In the crystal, inter­molecular C—H⋯O hydrogen bonds link the mol­ecules into layers parallel to (101).
doi:10.1107/S160053681104205X
PMCID: PMC3247378  PMID: 22219996
5.  6-Benzyl-6,7-dihydro-5H-pyrrolo­[3,4-b]pyridine-5,7-dione 
In the title compound, C14H10N2O2, the dihedral angle between the heterocyclic ring system and the phenyl ring is 45.8 (5)°. Weak inter­molecular C—H⋯N hydrogen bonding is present in the crystal structure.
doi:10.1107/S1600536811041006
PMCID: PMC3247312  PMID: 22219930
6.  [2-Cyclo­propyl-4-(4-fluoro­phenyl)quinolin-3-yl]methanol 
The title compound, C19H16FNO, crystallizes with two independent mol­ecules in the asymmetric unit. In the two mol­ecules, the dihedral angles between the benzene and quinoline rings are 72.6 (5) and 76.2 (5)°, between the cyclo­propane and quinoline rings they are 65.2 (5) and 66.0 (5)°, and between the benzene and cyclo­propane rings they are 25.9 (5) and 33.9 (5)°. There are inter­molecular O—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds, as well as intra­molecular C—H⋯O hydrogen bonds, which may be effective in stabilizing the crystal structure.
doi:10.1107/S1600536810043588
PMCID: PMC3009308  PMID: 21589152

Results 1-6 (6)