Crystallise it from pet ether (b 30-60o) at -20o. Also purify it as for 1-adamantyl fluoroformate below. Its IR has max at 4.2, 5.6 and 8.4 (2380, 1786 and 1190 cm-1). [Haas et al. J Am Chem Soc 88 1988 1966, cf Moroder et al. Hoppe-Seyler’s Z Physiol Chem 357 1647 1976.]
