Reaction of organic ytterbium derivatives with alkyl- and arylhalogenides

Interaction of a series of organic halogenides with organic bivalent ytterbium derivatives (like Grignard reagent, RYbX, where R=CH3, C6H5; X=Br, I) under metal complex catalysis is studied. Aromatic and aliphatic ytterbium derivatives undergo a reaction of cross combination with organic iodides and bromides under catalysis by NiCl2(PPh3)2 and Pd(PPh3)4 complexes. Therewith organo-ytterbium compounds quantitatively react with alkyl (aryl) iodides, bromine substitution for iodine in arylhalogenides results in decrease of yield of cross-combination products. Reactions of organo-ytterbium compounds with organic halogenides are more effectively catalysed by nickel complexes than by palladium ones