Dissolve vinylferrocene in Et2O, wash it with H2O and brine, dry (Na2SO4), and evaporate to a small volume. Purify it through an Al2O3 (Spence grade H) column by eluting the yellow band with pet ether (b 40-60o). The low melting orange crystals can be sublimed. The tetracyanoethylene adduct crystallises from *C6H6/pentane and has m 137-139o(dec). [Horspool & Sutherland Can J Chem 46 3453 1968, Berger et al. J Org Chem 39 377 1974, Rauch & Siegel J Organomet Chem 11 317 1968, Beilstein 16 III 1787.]
