Nucleophilic Addition to C,C-Double Bonds. Part VIII. The standard enthalpies of formation of anti9,10-10endo-hydroxytricyclo [4.2.1.12,5]deca-3,7-dien-9-one and 9-Oxatetracyclo [5.4.0.03,10.04,8]undec-5-en-2-one and kinetic data for the cyclization of the olefinic alcohol to the ether

In view of the significance of steric compression in the base-catalyzed intramolecular cyclization of polycyclic olefinic alcohols, the standard enthalpies of formation of anti^9,10-10 endo-hydroxytricyclo [4.2.1.1^2,5]deca-3,7-dien-9-one (1) and 9-oxatetracyclo [5.4.0.0^3,10.0^4,8]undec-5-en-2-one (2) as well as the kinetics of the ether formation 1 → 2 were determined.