No abstract

Abstract. Following the general procedure for the synthesis of spirooxazines, an unexpected new compound was obtained: C23H22N202, Mr=358.4, monoclinic, P21/n, a = 13.215 (3), b = 9.321 (1), c = 15.600 (4)/~,/3 = 105.68 (2) °, V= 1850.0 (7) A 3, z = 4, Dx = 1.287 Mg m -3, A(Mo Ka) = 0.71073 A, /1, = 0.077 mm-l, F(000) = 760, T= 296 K, final R = 0.0389, wR=0.0415 for 1775 reflections with I___ 3.0~r(/). This new compound, in chloroform solution, shows a colour change on irradiation with UV light or exposure to sunlight, and reverts to a light brown colour when kept in the dark after the removal of UV light.