Telomerization

a chain reaction involving unsaturated compounds (monomers) and a substance that acts to propagate the reaction chain. Telomerization produces a mixture of chemical species (telomers) having different molecular weights. The molecules of the products are constructed of monomeric units M, and the products’ end groups are fragments A and B from the propagating substance. Telomerization is described by the general equation:

This type of reaction is a special case of polymerization.

Of the monomers used in telomerization, the most thoroughly investigated are ethylene, α-olefins, vinyl chloride, vinyl acetate, perfluoroethylene, allyl and acrylic compounds, dienes, and diene derivatives. Among the compounds that act as propagating substances are CC1₄, CHC1₃, and RCBr₂COOCH₃. Telomerization is initiated by peroxides, azo compounds, transition-metal compounds, strong mineral and aprotic acids, and alkali metals.

Telomerization underlies processes for synthesizing large-ring lactones (perfumes), ω-amino acids, and higher carboxylic acids.

REFERENCES

Freidlina, R. Kh. “Radikal’naia telomerizatsiia.” In the collection Uspekhi khimii polimerov. Moscow, 1966. (With others.)
Petrov, A. A., and M. L. Genusov. Ionnaia telomerizatsiia. [Leningrad] 1968.
Starks, C. M. Free Radical Telomerization. New York-London, 1974.

单词	telomerization
释义	telomerization telomerization (tɛˌlɒməraɪˈzeɪʃən) or telomerisation n (Chemistry) chem polymerization in the presence of a chain transfer agent to yield a series of products of low molecular weight[C20: from telo- + -mer] Translations télomérisationтеломеризация Telomerization Telomerization a chain reaction involving unsaturated compounds (monomers) and a substance that acts to propagate the reaction chain. Telomerization produces a mixture of chemical species (telomers) having different molecular weights. The molecules of the products are constructed of monomeric units M, and the products’ end groups are fragments A and B from the propagating substance. Telomerization is described by the general equation: This type of reaction is a special case of polymerization. Of the monomers used in telomerization, the most thoroughly investigated are ethylene, α-olefins, vinyl chloride, vinyl acetate, perfluoroethylene, allyl and acrylic compounds, dienes, and diene derivatives. Among the compounds that act as propagating substances are CC1₄, CHC1₃, and RCBr₂COOCH₃. Telomerization is initiated by peroxides, azo compounds, transition-metal compounds, strong mineral and aprotic acids, and alkali metals. Telomerization underlies processes for synthesizing large-ring lactones (perfumes), ω-amino acids, and higher carboxylic acids. REFERENCES Freidlina, R. Kh. “Radikal’naia telomerizatsiia.” In the collection Uspekhi khimii polimerov. Moscow, 1966. (With others.) Petrov, A. A., and M. L. Genusov. Ionnaia telomerizatsiia. [Leningrad] 1968. Starks, C. M. Free Radical Telomerization. New York-London, 1974.
随便看	flame photometric detector, phosphorus mode flame photometry flame photometry, emission flame plate flame plating flame-projector flame-projectors flame proof flameproof flameproof coating flameproofed flameproofer flame proof fabric flameproofing flameproofly flameproofs flame propagation flame-quench-melt-growth flamer flame/radiant heat flame rate flame reaction flame rectification flame rectifier flame-red

telomerization

telomerization

telomerisation

Telomerization

Telomerization

REFERENCES