Acta Cryst. (2004). E60, o1568-o1570  [ doi:10.1107/S1600536804020082 ]

The sydnone compound 4-hydroxy-4-benzylsydno[3,4-a]indole

G. B. Riddle, D. A. Grossie and K. Turnbull

Abstract: The title compound (systematic name: 9-benzyl-1,9-dihydroxy-9H-indolo[1,2-c][1,2,3]oxadiazole), C₁₆H₁₂N₂O₃, was synthesized as part of a series of sydnones to determine substituent effects on the sydnone ring. The are two independent molecules in the asymmetric unit. There is interest in finding substituents for the sydnone ring that would allow for the release of NO via ring opening. Observed bond distances and angles for the sydnone ring are consistent with previously published structures, suggesting that the substituents used have little effect towards destabilization of the ring.

Online 21 August 2004

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