Abstract
In the title compound, C5H5ClN2, a by-product in the synthesis of ethyl 2-(3-chloropyridin-2-yl)-5-oxopyrazolidine-3-carboxylate, the amine groups form intermolecular hydrogen-bonding associations with pyridine N-atom acceptors, giving centrosymmetric cyclic dimers. Short intermolecular Cl⋯Cl interactions [3.278 (3) Å] also occur.
Highlights
Republic of China, and bAgrochemicals Division, Shenyang Research Institute of Chemical Industry, Shenyang 110021, People’s Republic of China
The title compound was isolated as a by-product in the preparation of ethyl 2-(3-chloropyridin-2-yl)-5-oxopyrazolidine-3-carboxylate, an intermediate in the synthesis of the insecticide chlorantraniliprole (systematic name 3-bromoN-[4-chloro-2-methyl-6-[(methylamino)carbonyl]phenyl]-1(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxamide), see: Lahm et al (2005)
R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger
Summary
Data collection a Department of Chemistry, Liaoning University, Shenyang 110036, People’s. Republic of China, and bAgrochemicals Division, Shenyang Research Institute of Chemical Industry, Shenyang 110021, People’s Republic of China. R factor = 0.059; wR factor = 0.182; data-to-parameter ratio = 14.5. C5H5ClN2, a by-product in the synthesis of ethyl 2-(3-chloropyridin-2-yl)-5-oxopyrazolidine3-carboxylate, the amine groups form intermolecular hydrogen-bonding associations with pyridine N-atom acceptors, giving centrosymmetric cyclic dimers. Short intermolecular Cl Cl interactions [3.278 (3) Å] occur. Symmetry code: (i) x þ 1; y þ 1; z þ 1
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