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8548926 
Journal Article 
Polymerization of 2-Hexyne and Higher 2-Alkynes Catalyzed by MoCl5·Ph4Sn and WCl6·Ph4Sn 
Higashimura, T; Deng, YX; Masuda, T; Deng, YX 
1982 
1 
Macromolecules
ISSN: 0024-9297
EISSN: 1520-5835 
15 
2 
234-238 
English 
The polymerization of 2-hexyne in toluene catalyzed by an equimolar mixture of MoCl5 and Ph4Sn provided an extremely high polymer (M̄w > 1 × 106) in virtually quantitative yield. A mixture of WCl6 and Ph4Sn also polymerized 2-hexyne (polymer M̄w ∼ 2 × 105). MoCl5 and WCl6 alone were ineffective as catalysts. Similarly, higher 2-alkynes (2-heptyne through 2-decyne) were polymerized by MoCl5·Ph4Sn or WCl6·Ph4Sn. Elemental and spectral analyses supported polyene structures for the poly(2-alkynes). The poly(2-alkynes) were white solids completely soluble in nonpolar solvents such as toluene and n-hexane and afforded sturdy films when cast from solution. © 1982, American Chemical Society. All rights reserved.