METAL COMPLEXES IN CATALYTIC TRANSFORMATION OF OLEFINS. 7. CHARACTERISTICS OF ACTIVE CENTERS AND THE MECHANISM OF DIMERIZATION OF ETHYLENE TO BUTENE-1 AND POLYMERIZATION OF ACETYLENE IN THE Ti(O-n-Bu)4-AlEt3 CATALYTIC SYSTEM IN ETHERS

Article abstract of DOI:10.1007/BF00864176

The formation and properties of active centers were studied in the dimerization of ethylene and polymerization of acetylene in the Ti(O-n-Bu)4-AlEt3 system, in heteroatomic solvents.The absence of ionic stages in the dimerization in dibutyl ether was established.Reaction of ethylene, acetylene (A), and phenylacetylene (PA) with the paramagnetic Ti(I) complex, producing butene-1 or polyacetylenes, a paramagnetic complex, and diamagnetic products, was established for the first time.The effect of such factors as T, ₀, Al/Ti, and M/Ti on consumption and accumulation kinetics of paramagnetic products was studied.Formation of a carbon-centered radical, produced by A or PA joining Ti(I) in the oxidation process, and whose further transformations cause derivation of all the above-mentioned products, was suggested.A probable mechanism was suggested for dimerization of ethylene to butene-1, with intermediate formation of titanacycles. Keywords: acetylene, ethylene, butene-1, tetrabutoxytitanium, triethylaluminum.