Method of preparing telomers utilizing as catalysts hydrocarbon-soluble organometallic complexes of metals of groups i and iia of the periodic table

Claim 2

The method of claim 1, in which telomers are prepared and in which the telogen is toluene and the taxogen is 1,3-butadiene.

Claim 3

The method of claim 2, in which the (i) organo-metallic compound is a dialkylmagnesium in which each alkyl contains from three to six carbon atoms.

Claim 4

The method of claim 4, in which the dialkyl-magnesium is selected from the group of di-n-butylmagnesium and di-sec-butylmagnesium.

Claim 5

The method of claim 2, in which the (ii) organo-metallic compound is an alkyl alkali metal compound in which the alkyl contains from three to six carbon atoms.

Claim 6

The method of claim 6, in which the alkyl alkali metal compound is selected from the group of n-butyllithium, n-butylsodium and n-butylpotassium.

Claim 7

The method of claim 3, in which the catalyst is a complex of dibutylmagnesium with n-butyllithium or n-butylpotassium.

Claim 8

The method of claim 1, in which the (ii) organo-metallic compound is a polylithioadduct of a conjugated diene selected from the group of isoprene or 1,3-butadiene.

Claim 9

In a method of preparing telomers in which the telomers are prepared, in the presence of a catalyst, by a reaction between (a'') a telogen in the form of an aromatic compound containing at least one active hydrogen capable of being replaced by a metal atom but devoid of any other substituents which are reactive with the organometallic compounds defined hereafter, with (a'''') at least one taxogen in the form of a monomer selected from the group consisting of conjugated dienes, vinyl-substituted aromatic compounds, and monoolefins, the improvement which consists in the utilization, as the catalyst, of a complex of at least one dialkyl-magnesium containing from two to 14 carbon atoms with at least one alkylmetallic compound in which the metal of said alkylmetallic compound is selected from the group of lithium, sodium, and potassium.

Claim 10

The method of claim 10, in which the telogen is toluene and the taxogen is 1,3-butadiene.

Claim 11

The method of claim 10, in which the catalyst complex is employed in the form of a solid.