Reversible hydrogenation of anthracene during complexation to cyclopentadienyliron: change in regioselectivity depending on the steric bulk of the cyclopentadienyl group
Abstract
Anthracene and dihydroanthracene react with (C5Me5)Fe(CO)2Br and AlCl3 to give a mixture of [(C5Me5)Fe(η6-9,10-dihydroanthracene)]+X– and [(C5Me5)Fe(η6-1,2,3,4-tetrahydroanthracene)]+X–(60:40) whereas under identical conditions, (C5H5)Fe(CO)2Cl gives only [(C5H5)Fe(η6-9,10-dihydroanthracene)]+X–.