Abstract
The title compound, C10H15N2O4 +·Cl−, was obtained as an unexpected by-product during the synthesis of 1-[2-(substituted aryl)]-3-methylpyrazol-5-ones. The hydrazide group is essentially planar, with an r.s.m. deviation of 0.020 (2) Å, and is oriented at a dihedral angle of 30.52 (3)° with respect to the benzene ring. In the crystal structure, the cations and anions are linked through N—H⋯O and N—H⋯Cl hydrogen bonds, forming a molecular tape running along the b axis.
Highlights
The title compound, C10H15N2O4+ÁClÀ, was obtained as an unexpected by-product during the synthesis of 1-[2-(substituted aryl)]-3-methylpyrazol-5-ones
The cations and anions are linked through N—HÁ Á ÁO and N—HÁ Á ÁCl hydrogen bonds, forming a molecular tape running along the b axis
H atoms treated by a mixture of independent and constrained refinement
Summary
Key indicators: single-crystal X-ray study; T = 223 K; mean (C–C) = 0.002 A; R factor = 0.040; wR factor = 0.111; data-to-parameter ratio = 22.0. The title compound, C10H15N2O4+ÁClÀ, was obtained as an unexpected by-product during the synthesis of 1-[2-(substituted aryl)]-3-methylpyrazol-5-ones. The cations and anions are linked through N—HÁ Á ÁO and N—HÁ Á ÁCl hydrogen bonds, forming a molecular tape running along the b axis. Related literature For general background, see: Jin et al (2006); Song et al (2005); Yang et al (2007). See: Zareef et al (2006). For bond-length data, see: Allen et al (1987)
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