CLO[2.2.1]-HEPTANE-2-SPIRO-5'(4'H)-ISOXAZOLE-3-ONE

The title compound, C15H13Cl2NO2, resulted from a 1,3-dipolar cycloadd ition (a class of reactions of significant importance in heterocyclic chemistry). The isoxazole ring atoms are coplanar to within 0.05 (1) A ngstrom and the cyclohexanone ring of the norbornanone moiety adopts t he expected boat form with the two five-membered rings in envelope con formations. The orientation of the isoxaxole ring to the cyclohexanone ring is given by the torsion angles O1'-C2-C3-O3 71.7 (4) and C4'-C2- C1-C6 -64.0 (4)degrees. The dihedral angle between the isoxazole and 2 ,6-dichlorophenyl rings is 73.3 (3)degrees.