The formation of -dibromomethylene-2,2-dimethyl-1-hydroxynorbornane as
a minor-product of the 3,3-dibromocamphor bromination was found. The
structure of this compound was established on the basis of spectral da
ta analysis The occurrence of alcohol in the bromination product mixtu
re can be taken as evidence supporting the assumed mechanism of campho
r methyl group bromination.