Ghallab Rochdi, Kemmouche Amina, Boutebdja Mehdi, Golhen Stéphane
Laboratoire de Technologie des Matériaux Avancés Ecole Nationale Polytechnique de Constantine Algeria.
Ecole Nationale Superieure de Biotechnologie de Constantine, Algeria.
IUCrdata. 2025 Aug 15;10(Pt 8):x250676. doi: 10.1107/S2414314625006765. eCollection 2025 Aug.
The title compound, (CHNO)[SnCl]·2HO, features l-leucinium cations adopting extended conformations, which maximizes the separation between the methyl groups [-CH(CH)] and the polar NH and COOH moieties. Additionally, an intra-molecular hydrogen bond between the ammonium (NH ) group and the carboxyl group induces a slight reduction in the C-C-N bond angles, with an average value of 106.5°, compared to the ideal tetra-hedral angle of 109.5°. The NH group is nearly coplanar with the C-C-C-C carbon chain in both fragments, whereas the carboxyl (COOH) group and the methyl group at the C5 position deviate significantly from this plane. The octa-hedral complex anion is close to regular. In the crystal, an extensive network of hydrogen bonds links the components into a three-dimensional network.
标题化合物(CHNO)[SnCl]·2HO的特征是L-亮氨酸阳离子具有伸展构象，这使甲基[-CH(CH)]与极性NH和COOH部分之间的距离最大化。此外，铵(NH)基团与羧基之间的分子内氢键导致C-C-N键角略有减小，平均值为106.5°，而理想四面体角为109.5°。在两个片段中，NH基团几乎与C-C-C-C碳链共面，而羧基(COOH)基团和C5位置的甲基显著偏离该平面。八面体络合阴离子接近规则形状。在晶体中，广泛的氢键网络将各组分连接成三维网络。
