Eucalyptol forms crystalline adducts with halogen acids, o-cresol, resorcinol, and phosphoric acid.
It acts to extend and adduct at the carpus/wrist.
Borane adducts with phosphines and amines are also available.
The resulting adduct is brominated followed by treatment with hydrogen chloride in nitromethane in the presence of aluminum trichloride or with iodine monochloride.
Flavanol-anthocyanin adducts are formed during wine ageing through reactions between anthocyanins and tannins present in grape, with yeast metabolites such as acetaldehyde.
This strategy has been used, for instance, to generate aromatic cyclopentadienyl anions from adducts of cyclopentadiene.
They can be thought of as protected boronic acids, or as adducts of carbanions and boron trifluoride.
For example, most superoxide spin adducts are relatively unstable and decay rapidly to non-radical species, and the rate constants for the spin trapping of superoxide are usually low.
