Hu Zhi-Nan, Yang Hui-Bin, Luo Huan, Li Bin
Acta Crystallogr Sect E Struct Rep Online. 2011 May 1;67(Pt 5):o1138. doi: 10.1107/S1600536811013432. Epub 2011 Apr 16.
In the title compound, C(5)H(5)ClN(2), a by-product in the synthesis of ethyl 2-(3-chloro-pyridin-2-yl)-5-oxopyrazolidine-3-carboxyl-ate, the amine groups form inter-molecular hydrogen-bonding associations with pyridine N-atom acceptors, giving centrosymmetric cyclic dimers. Short inter-molecular Cl⋯Cl inter-actions [3.278 (3) Å] also occur.
在标题化合物C(5)H(5)ClN(2)(2-(3-氯吡啶-2-基)-5-氧代吡唑烷-3-羧酸乙酯合成中的一种副产物)中,胺基与吡啶N原子受体形成分子间氢键缔合,形成中心对称的环状二聚体。还存在短的分子间Cl⋯Cl相互作用[3.278 (3) Å]。