Abstract
In the title compound, C11H11N3O4, the 3,5-dioxopiperazine ring adopts an envelope conformation, with the N atom connecting to the –CH2COOH group on the flap. In the crystal, molecules are linked by O—H⋯N hydrogen bonds to produce a linear chain running along the c axis. π–π stacking is observed between parallel pyridine rings of adjacent molecules, the centroid–centroid distance being 3.834 (2) Å.
Highlights
C11H11N3O4, the 3,5-dioxopiperazine ring adopts an envelope conformation, with the N atom connecting to the –CH2COOH group on the flap
Molecules are linked by O—H N hydrogen bonds to produce a linear chain running along the c axis. – stacking is observed between parallel pyridine rings of adjacent molecules, the centroid–centroid distance being 3.834 (2) Å
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
H atoms treated by a mixture of independent and constrained refinement max = 0.19 e Å3. R factor = 0.083; wR factor = 0.139; data-to-parameter ratio = 13.1. Symmetry code: (i) x; y þ 52; z þ 12. C11H11N3O4, the 3,5-dioxopiperazine ring adopts an envelope conformation, with the N atom connecting to the –CH2COOH group on the flap. Molecules are linked by O—H N hydrogen bonds to produce a linear chain running along the c axis. – stacking is observed between parallel pyridine rings of adjacent molecules, the centroid–centroid distance being 3.834 (2) Å
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