{{short description|Chemical reaction producing oligomers with two distinct end groups}} {{About|the polymerization reaction|the DNA component|telomere}}
'''Telomerization''' is a reaction that produces a particular kind of oligomer with two distinct end groups. The oligomer is called a '''telomer'''.<ref>{{GoldBookRef | title = telomerization | file = T06260}}</ref> Some telomerizations proceed by radical pathways, many do not. A generic equation is: :{{chem2 | A\sB + nM -> A\sM_{n}\sB }} where M is the monomer, and A and B are the end groups, and n is the degree of polymerization.
One example is the coupled dimerization and hydroesterification of buta-1,3-diene. This step produces a doubly unsaturated C9-ester:<ref name=Ullmann2>{{Ullmann|title=Butadiene|author=J. Grub |author2=E. Löser |year=2012|doi=10.1002/14356007.a04_431.pub2}}</ref> :2{{nbsp}}CH<sub>2</sub>=CH-CH=CH<sub>2</sub> + CO + CH<sub>3</sub>OH → CH<sub>2</sub>=CH(CH<sub>2</sub>)<sub>3</sub>CH=CHCH<sub>2</sub>CO<sub>2</sub>CH<sub>3</sub> The monomer in this reaction is butadiene, the degree of polymerization is 2, and the end groups are vinyl and the carboxy methyl (CO<sub>2</sub>CH<sub>3</sub>). This and several related reactions proceed with palladium catalysts.<ref>{{cite journal |doi=10.1021/cr010328q|title=Palladium-Catalyzed Reppe Carbonylation|year=2001|last1=Kiss|first1=Gabor|journal=Chemical Reviews|volume=101|issue=11|pages=3435–3456|pmid=11840990}}</ref> Many telomerizations are used in industrial chemistry.<ref name=Leh>{{cite journal |last=Lehmler |first=HJ |title=Synthesis of environmentally relevant fluorinated surfactants—a review |journal=Chemosphere |volume=58 |issue=11 |pages=1471–96 |date=Mar 2005 |doi=10.1016/j.chemosphere.2004.11.078 |pmid=15694468 |bibcode=2005Chmsp..58.1471L}}</ref>
==Nomenclature== According to the jargon in polymer chemistry, telomerization requires a '''telogen''' to react with at least one unsaturated '''taxogen''' molecule.<ref name=Leh/> Fluorotelomers are an example.
==See also== *Perfluorooctanoic acid (synthesis) *Telomerization (dimerization)
==References== {{reflist}} {{reaction-stub}} {{Authority control}}
Category:Chemical synthesis Category:Chemical processes Category:Industrial processes Category:Polymer chemistry Category:Oligomers