Methyl-1,3 -butadiene

Butadiene, 2 -methyl -1,3-lmLadiene (uoprene), and 2,3-dimethyl-1,3-butadiene can yield mono- or diepoxides depending on ilie reactant ratio employed. 11 With isoprene the most substituted rlntible bond is attacked first (Eq. 7). 

Isoprene 1,3-Butadiene, 2-methyl- Palmitic acid Hexadecanoic acid... 

Polymers with unsaturated carbon chain backbone form another important class of macromolecules, many of the compounds from this class having properties of elastomers. The most common polymers from this class are obtained from 1,3-butadiene, 2-methyl-1,3-butadiene (isoprene) and their derivatives. Natural rubber, which is poly(c/s-isoprene), as well as the natural polymers gutta-percha and balata also have an unsaturated carbon chain backbone. For many practical applications, the polymers from this class are subject to a process known as vulcanization, which consists of a reaction with sulfur or S2CI2, and leads to the formation of bridges between the molecular chains of the polymer. This process significantly improves certain physical properties of practical interest. A separate subclass of polymers with unsaturated carbon chain backbone is formed by polyacetylene. 

Dimethyl-1,3-butadiene 2-Methyl-l, 3-butadiene cb-1,3-Butadiene trans-1,3-Butadiene ci i-1,3-Pentadiene trans-1,3-Pentadiene cw-1,3,5-Hexatriene trans-1,3,5-Hexatriene... 

CfiHio)- 1- Hexyne, 3, 3-dimethylbut-l-yne, 2, 3-dimethyl-1, 3-butadiene, 2- methyl-l, 4-pentadiene 20 b 930... 

Butadiene, 2-methyl CH2C(CH3)-CHCH2 108.8 2 455.2 8.4 Derived from AfffO in ref. 1996NIST... 

It is recognized that the propagation reaction involving dienes or styrene is dependent upon active center concentration raised to a fractional power 1/2 in the case of styrene and 1/4 to 1/6 for the 1,3-butadiene 2-methyl-... 

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