The present invention relates to a ligand compound, a catalyst system for olefin oligomerization and a method for oligomerizing an olefin using same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.

The present invention relates to cyclopropane skeleton monophosphine ligands and preparation methods for palladium complexes thereof and an application. Specifically, trans-diaryl substituted cyclopropane skeleton monophosphine ligands are synthesized after trans-1,2-diaryl ethylene undergoing the steps of cyclopropanation reaction, debromination reaction, substitution reaction, and the like. Palladium complexes prepared by coordinating the cyclopropane skeleton monophosphine ligands with a palladium salt show very high activity in catalyzing CN bond coupling reactions, and have good application prospects.

The present invention relates to cyclopropane skeleton monophosphine ligands and preparation methods for palladium complexes thereof and an application. Specifically, trans-diaryl substituted cyclopropane skeleton monophosphine ligands are synthesized after trans-1,2-diaryl ethylene undergoing the steps of cyclopropanation reaction, debromination reaction, substitution reaction, and the like. Palladium complexes prepared by coordinating the cyclopropane skeleton monophosphine ligands with a palladium salt show very high activity in catalyzing CN bond coupling reactions, and have good application prospects.