تفاعل #926957

معادلة التفاعل

phenylacetylene

chlorobenzene

phenylacetylene

triphenylphosphine

→

diethynylbenzene

phenylacetylene

المذيبات

benzene

benzene

benzene

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةAfter heating
2. 2
   درجة الحرارةto reflux
3. 3
   أخرى5 parts of a catalyst solution prepared
4. 4
   workup.ADDITIONwere added
5. 5
   workup.ADDITIONan additional 10 parts of this catalyst solution was added
6. 6
   workup.WAITAfter 5 hours
7. 7
   أخرىThe copolymer was precipitated
8. 8
   workup.ADDITIONby adding the solution to five times its volume of petroleum ether, 26 parts
9. 9
   أخرىbeing recovered

الإجراء التجريبي

A copolymer prepolymer of diethynylbenzene and phenylacetylene was prepared in refluxing benzene solvent. The polymerization vessel was charged with 60 parts of a 90:10 mixture of m- and p-diethynylbenzenes, 60 parts of phenylacetylene, 600 parts of benzene and 2 parts of chlorobenzene. After heating to reflux, 5 parts of a catalyst solution prepared by adding 0.3 part of nickel acetylacetonate and 0.6 part of triphenylphosphine in 15 parts benzene were added. After 2 hours, an additional 10 parts of this catalyst solution was added. After 5 hours, gas-liquid chromatographic analysis showed that 74% of the diethynylbenzenes and 35% of the phenylacetylene had been converted to copolymer. The copolymer was precipitated by adding the solution to five times its volume of petroleum ether, 26 parts being recovered. This product had a number average molecular weight of about 3,000, an acetylene content of 8.9%, and an aromatic to olefin proton ratio of 5.5:1.

المصدر