Dimerization of aldehydes by thorium complexes.

S. no.	Catalyst	RCHO [% yield]
1	Cp*2ThMe2	Ph-[65], p-CH3-Ph-[25], m-CH3-Ph-[20], o-CH3-Ph-[10], p-Cl-Ph-[84], m-Cl-Ph-[81], o-Cl-Ph-[75]
2	Th[NEtMe]4	Ph-[85], p-CH3-Ph-[82], m-CH3-Ph-[75], o-CH3-Ph-[55], p-Cl-Ph-[97], m-Cl-Ph-[96], o-Cl-Ph-[95]
3	Me2SiCp′′2Th(n-C4H9)	Ph-[96], p-CH3-Ph-[74], m-CH3-Ph-[94], o-CH3-Ph-[70], p-Cl-Ph-[98], m-Cl-Ph-[95], o-Cl-Ph-[89], p-CN-Ph-[98], p-MeO-Ph-[39], m-NO2-Ph-[98]