Purification Methods
Crystallise adamantane from acetone or cyclohexane, and sublime it in a vacuum below its melting point [Butler et al. J Chem Soc, Faraday Trans I 82 535 1986]. Adamantane is also purified by dissolving it in n-heptane (ca 10mL/g of adamantane) on a hot plate, adding activated charcoal (2g/100g of adamantane), and boiling for 30minutes, filtering the hot solution through a filter paper, concentrating the filtrate until crystallisation just starts, adding one quarter of the original volume of n-heptane, and allowing to cool slowly over a period of hours. The supernatant is decanted off and the crystals are dried in vacuo at 25o. [Prelog & Seiwerth Chem Ber 74 1769 1941, Schleyer et al. Org Synth Coll Vol V 16 1973, Walter et al. J Am Chem Soc 107 793 1985.] [Beilstein 5 III 393, 5 IV 469.]