Intramolecular hydrogen bonding of the some terpenic cyclic unsaturated alcohols, such as 2-hydroxymethyl-6 (1) -p-menthene, 3-hydroxylmethyl-4 (5) -p-menthene, nopol, 1, 3, 6, 10, 10-pentamethyl-4-hydroxymethylbicyclo [4, 4, 0] decene-2, 3-hydroxymethyl-5-tert-butylcyclohexene and 3-hydroxym-ethylcyclooctene was measured by infrared absorption and nuclear magnetic resonance spectra.
