potassium hydroxide in ethanol to a soln. of K2Fe(CO)4, prepd. from Fe(CO)5 and KOH in EtOH, was addeddropwise allyl phosphate, mixt. was stirred at room temp. for 1 h; alkene was obtained as 88:12 mixt. of (E)- and (Z)-isomers (GLC data); reaction mixt. was poured into water, extd. with light petroleum, exts.were dried (Na2SO4), concd., residue chromd. on SiO2 (light petroleum),sepn. of the alkene and Fe-complex (elem. anal.) was performed by careful Kugelrohr distn.;