Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Chemistry and Pharmacology
The title compound, C23H16N4O4, can be considered as consisting of two connected fragments: a nitrophenylhydrazone moiety, which assumes an E configuration, and an isoxazole moiety. In this latter fragment, the weak π-electron delocalization shortens the carbonyl–isoxazole O...O distance [2.643 (2) Å] to less than the van der Waals radii sum.
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