Hydronickel complexes

The hydronickel complex formed from tetrakis(tri-o-tolylphosphite)-nickel(O) and HCl in tetrahydrofuran is an active catalyst for the skeletal isomerization of hexa-2,4-diene as shown [162). The suggested mechanism... 

Dichlorobis(triethylphosphine)nickel(II) is an effective catalyst for the reaction of symmetrical tetramethyldisilane with unsaturated hydrocarbons (237). A hydronickel complex was postulated as being involved in the reaction, although the mechanism may involve the intermediacy of a dimethylsilylene compound formed by Si—Si bond cleavage rather than the silyl-nickel bond being formed by Si—H bond cleavage. The complex was an effective catalyst for formation of the... 

Hydronickel complexes such as those obtained from AlHBua and PPh(OR)2 have been reported active for the addition of secondary amines to butadiene. The product obtained involved addition of 2 molecules of the amine to the dimer of butadiene 249) ... 

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