PdCl2(CH3CN)2 and [PtCl2(H2CCH2)]2 catalyze the addition of β-dicarbonyl compounds to ethylene and propylene.
![[double bond, length as m-dash]](http://www.rsc.org/images/entities/char_e001.gif)
CH2)]2 catalyze the addition of β-dicarbonyl compounds to 
