title: 1-Ethyl-5-iodo-indoline-2,3-dione.
abstract: There are two independent mol-ecules in the asymmetric unit of the title compound, C10H8INO2, which differ in the degree of planarity. The iodo-indoline-2,3-dione skeleton of mol-ecule 1 is essentially planar [mean deviation = 0.003 (2) Å for the nine non-H atoms of the indoline core, with a maximum deviation of 0.033 (1) Å for the I atom]. The I atom and O atom in the 3-position of mol-ecule 2 deviate by 0.195 (1) and 0.120 (2) Å, respectively, from the least-squares plane through the nine non-H atoms of the indoline core. Mol-ecules 1 and 2 are roughly coplanar, the mean planes through their cores making a dihedral angle of 6.84 (1)°. This coplanarity results in a layer-like structure parallel to (6,11,17) in the crystal, the distance between adjacent least-squares planes through the cores of mol-ecules 1 and 2 being 3.37 (1) Å. In such a layer, mol-ecules 1 and 2 are linked by C-H⋯O hydrogen bonds, forming chains along [11-1]. The chains are further coupled to construct a kind of double-chain structure via I⋯O inter-actions [3.270 (2) Å].
authors: School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
authors: Lei
authors: L
authors: Wang
authors: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors: Yu-Xiang
authors: YX
authors: Shen
authors: School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
authors: Jian-Tong
authors: JT
authors: Dong
authors: School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
authors: Man
authors: M
authors: Zhang
authors: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors: Qi
authors: Q
authors: Fang