2-Methyl-l-butene

Methyl-l -butene N-Methylbutylamine Methyl butyl ketone Methyl butyrate Methyl cellosolve Methyl cellosolve acetate Methyl chloride... 

Fluoride ion produced from the nucleophilic addition-elimination reactions of fluoroolefins can cataly7e isomerizations and rearrangements The reaction of per fluoro-3-methyl-l-butene with dimethylamine gives as products 1-/V,/Vdimeth-ylamino-1,1,2,2,4,4,4-heptafluoro-3-trifluoromethylbutane, N,W-dimetliyl-2,2,4,4,4-pentafluoro 3 trifluoromethylbutyramide, and approximately 3% of an unidentified olefin [10] The butylamide results from hydrolysis of the observed tertiary amine, and thus they share a common intermediate, l-Al,A -dimethylamino-l,l 24 44-hexafluoro-3-trifluoromethyl-2-butene, the product from the initial addition-elimination reaction (equation 4) The expected product from simple addition was not found... 

The first-order rate constant for ethanolysis of the allylic chloride 3-chloro-3-methyl-l-butene is over 100 times greater than that of terr-butyl chloride at the same temperature. 

The carbocation formed on ionization of l-chloro-3-methyl-2-butene is the same allylic carbocation as the one formed on ionization of 3-chloro-3-methyl-l-butene and gives the same mixture of products. 

Methyl-l-butene 2-Methyl-2-butene 3-Methyl-l-butene... 

Dibromo-3-methyl-l-butene 3,4-dibromo-2-methyl-l-butene and l,4-dibromo-2-methyl-2-butene... 

The most radiation-stable poly(olefin sulfone) is polyethylene sulfone) and the most radiation-sensitive is poly(cyclohexene sulfone). In the case of poly(3-methyl-l-butene sulfone) there is very much isomerization of the olefin formed by radiolysis and only 58.5% of the olefin formed is 3-methyl-l-butene. The main isomerization product is 2-methyl-2-butene (37.3% of the olefin). Similar isomerization, though to a smaller extent, occurs in poly(l-butene sulfone) where about 10% of 2-butene is formed. The formation of the olefin isomer may occur partly by radiation-induced isomerization of the initial olefin, but studies with added scavengers73 do not support this as the major source of the isomers. The presence of a cation scavenger, triethylamine, eliminates the formation of the isomer of the parent olefin in both cases of poly(l-butene sulfone) and poly(3-methyl-1-butene sulfone)73 indicating that the isomerization of the olefin occurred mainly by a cationic mechanism, as suggested previously72. 

Kennedy, J. P. and Johnston, J. E. The Cationic Isomerization Polymerization of 3-Methyl-l-butene and 4-Methyl-1-pentene. Vol. 19, pp. 57-95. 

Scott, D.E., Waddington, G. (1950) Vapor pressure of cA-pentene, tram-2-pentene and 3-methyl-l-butene. J. Am. Chem. Soc. 72, 4310—4311. 

Data concerning the chain conformations of isotactic polymers are reported in Table 2.1. In all the observed cases the torsion angles do not deviate more than 20° from the staggered (60° and 180°) values and the number of monomeric units per turn MIN ranges between 3 and 4. Chains of 3-substituted polyolefins, like poly(3-methyl-l-butene), assume a 4/1 helical conformation (T G )4,45,46 while 4-substituted polyolefins, like poly(4-methyl-1-pentene), have less distorted helices with 7/2 symmetry (T G )3.5-39 When the substituent on the side group is far from the chain atoms, as in poly(5-methyl-1-hexene), the polymer crystallizes again with a threefold helical conformation (Table 2.1). Models of the chain conformations found for the polymorphic forms of various isotactic polymers are reported in Figure 2.11. 

The fractions from this distillation may be analyzed by gas chromatography employing a column packed with Carbowax 20M suspended on Chromosorb P. The retention times for the various components (minutes) are pentane, 1.6 3-methyl-2-butanone, 4.2 3-methyl-l-buten-2-yl triflate, 6.7 and 3-methyl-2-buten-2-yl triflate, 9.5. 

The electrophilic addition of nitrosyl chloride with 3-methyl-l,2-butadiene at 0°C afforded 2-nitroso-3-chloro-3-methyl-l-butene, in which the nitrosyl group was connected to the central carbon atom [10]. 

Dichlorination of tetramethylallene afforded 3-chloro-2,4-dimethyl-l,3-pentadiene as the single product, whereas the same reaction of 1,1-dimethylallene yielded a mixture of 2-chloro-3-methyl-l,3-butadiene, 2,3-dichloro-3-methyl-l-butene and 1,2-dichloro-3-methyl-2-butene, indicating the intermediacy of the 2-chloroallylic cationic intermediate 11 [13]. 

Sasaki et al. (1976) studied the phase-transfer catalysed generation of dimethylvinylidenecarbene [190] from 3-chloro-3-methyl-l-butene promoted... 

Formation of triazoline by addition of phenylazide to 3-methyl-l-butene and its photodecomposition products... 

Figure 5. Programmed temperature gas chromatogram of photoreaction products of phenylazide with 3-methyl-l-butene in benzene...

Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rate of 3-methyl-1-butene was 6.9 mg/kg of pine burned. Emission rates of 3-methyl-l-butene were not measured during the combustion of oak and eucalyptus. 

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