6-Chloro-1-methyl-indoline-2,3-dione.

The title mol-ecule, C(9)H(6)ClNO(2), is essentially planar: the maximum deviation from the mean plane of the indoline ring is 0.020 (2) Šand the substituents do not deviate by more than 0.053 (2) Šfrom this plane. C-H⋯O hydrogen bonds help to consolidate the crystal structure.

N-(2,6-Dichloro-phen-yl)-5-methyl-1,2-oxazole-4-carboxamide monohydrate.

In the title compound, C(11)H(8)Cl(2)N(2)O(2)·H(2)O, the dihedral angle between the benzene and isoxazole rings is 59.10 (7)°. In the crystal, the components are linked by N-H⋯O and O-H⋯O hydrogen bonds into a three-dimensional network. The crystal structure is further stabilized by π-π stacking inter-actions [centroid-centroid distance = 3.804 (2) Å].

1-Benzyl-6-chloro-indoline-2,3-dione.

In the title compound, C(15)H(10)ClNO(2),the dihedral angle between the mean planes of the benzene and 6-chloro-indoline-2,3-dione ring systems, linked through a methyl-ene group, is 81.68 (10)°. In the crystal, mol-ecules are connected by C-H⋯O hydrogen bonds, generating C(6) chains propagating in [010].

3-Chloro-azepan-2-one.

In the title compound, C(6)H(10)ClNO, an inter-mediate for the production of lysine, there are intra-molecular C-H⋯Cl hydrogen bonds.

1-Benzoyl-3-chloro-azepan-2-one.

In the crystal structure of the title compound, C(13)H(14)ClNO(2), inter-molecular C-H⋯O inter-actions link the mol-ecules into a two-dimensional network.

(4S,5S)-2-(2-Bromo-phen-yl)-1,3-dioxolane-4,5-dicarboxamide.

The asymmetric unit of the title compound, C(11)H(11)BrN(2)O(4), contains two crystallographically independent mol-ecules in which the bromo-phenyl rings are oriented at dihedral angles of 39.28 (3)°. The dioxolane rings adopt envelope conformations. Intra-molecular N-H⋯O hydrogen bonds result in the formation of four five-membered rings, having planar and envelope conformations. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds link mol-ecules into chains along the b axis, forming R(2) (2)(8) ring motifs.

(4S,5S)-2-(4-Chloro-phen-yl)-1,3-dioxolane-4,5-dicarboxamide.

The title compound, C(11)H(11)ClN(2)O(4), is an important inter-mediate for the preparation of platinum anti-cancer drugs. The dioxolane ring adopts a twist conformation with an equatorially attached chloro-phenyl substituent. In the crystal structure, mol-ecules are linked into a two-dimensional network parallel to (001) by N-H⋯O and C-H⋯O hydrogen bonds.