[3aR-(3aα,4α,7α,7aα)]-2-Acetyl-4,8,8-trimethylperhydro-4,7-methano-1,2-benzisoselenazol-3a-ol

Crystals of the title compound, C₁₃H₂₁NO₂Se, are composed of independent molecules wherein the six-membered ring of the camphor-derived moiety is fused with a novel five-membered heterocyclic ring incorporating Se and N atoms. The bond lengths and angles are normal, with Se—N and Se—C distances of 1.865 (3) and 1.943 (3) Å, respectively, and an N—Se—C angle of 87.1 (2)°. The mean value of the Csp³—Csp³ bond length in the camphor moiety is 1.542 (15) Å. The five-membered ring has an N-envelope conformation and the molecules are hydrogen bonded forming chains extended along the b axis direction, with O...O and O—H...O separations of 2.769 (4) and 1.84 Å, respectively.

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