The radical telomerization of propylene with CCl4 was studied in the presence ofπ-allylirontricarbonyl chloride,π-allylirontricarbonyl iodide (at 105°), FeCl3 (145, 200°), and iron triacetylacetonate (105, 145°).
The compounds mentioned induced a multiple increase in the yield of the adduct, rate of telomerization, and constants of chain transfer of the radicals CCl3[CH2CH(CH3)] n . with n=1 and 2 within a definite range of concentrations. The apparent rate of transfer of chlorine forπ-C3H5Fe(CO)3Cl and FeCl3 passes through a maximum in a rather narrow region of initial concentrations of the iron compounds, followed by a sharp decrease to some constant value. Raising the temperature lowers the transmitting activity of FeCl3.
To explain the observed effects, a hypothesis was advanced on the possibility of direct interaction according to the mechanism of transfer of the ligand of the intermediate or initial chlorine-containing iron compound with telomer radicals. Some general principles of the initiation of radical telomerization of C3H6 with CCl4 by iron compounds are discussed.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 65–73, January, 1971.
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Énglin, B.A., Osipov, B.N. Influence of certain iron compounds on the distribution of telomer homologs and the particular chain transfer constants in the radical telomerization of propylene with CCl4 . Russ Chem Bull 20, 57–62 (1971). https://doi.org/10.1007/BF00849319