4-Methylspiro[4-azahomoadamantane-5,3'-[3'H]naphth[2,1-b][1,4]oxazine], a New Photochromic Spirooxazine

Comparison of the molecular geometry of the title compound, C₂₂H₂₄N₂O, with that of other spirooxazines indicates that there is no correlation between the degree of planarity of the oxazine ring and the photochromic properties. The Csp³-O bond, at 1.4767 (7) Å, is long, in keeping with its weakness.

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