TiCl4 with A1(CH3)3 forms the basis of the Ziegler catalysts
used to manufacture polyethylene (polythene) Iron catalysts are used in
the Haber process for the production of ammonia from N2/H2 mixtures Nickel catalysts enable the hydrogenation of fats to proceed In the Wacker
process the oxidation of ethyne to ethanal is catalysed by PdCl2