Formation mechanism and structure of compounds catalytically active in propylene dimerization and formed in Pd(acac)2−PR3−BF3OEt2 systems

Styrene oligomerization in the presence of catalytic systems based on Pd(acac)2 and BF3OEt2

“…This deafly demonstrates the stabilizing role of PPh3 as a ligand in AC with the composition HPd(L),(P)BF4 (V), where P = PPh3, L = C~-Is, n ___ 2, and in AC which are assumed to contains two organophosphorus ligands in the coordination sphere of Pd. The conclusion on the PPh3 coordination to Pd of type V AC is consistent with the formation of similar AC for Pd(acach+PPh3+nBF3OEt2 and Pd(acachPPh3+nBF3OEt2 systems observed by IR and UV spectroscopy [2,5,111.…”

“…Catalytic systems on the basis of palladium 13-diketonates and boron trifluoride etherate Pd(acac)2+nBF3OEh (n = 7-20) are known to exhibit high activity and selectivity in oligomerization of ethene and propene, positional isomerization of c~-alkenes and telomerization of butadiene with amines [1][2][3][4]. The products of interaction between the components of these systems, including the case of the presence of unsaturated hydrocarbons (hexene-1, butadiene, phenylacetylene), have been studied by IR, UV and IH, 13C, 11B NMR spectroscopy.…”