Search results
Results from the WOW.Com Content Network
Isobutylene (or 2-methylpropene) is a hydrocarbon with the chemical formula (CH 3) 2 C=CH 2. It is a four-carbon branched alkene (olefin), one of the four isomers of butylene . It is a colorless flammable gas, and is of considerable industrial value.
2-Methyl-2-butene (CAS 513-35-9) Index of chemical compounds with the same molecular formula This set index page lists chemical structure articles associated with the same molecular formula .
2-Methyl-2-butene, 2m2b, 2-methylbut-2-ene, beta-isoamylene, or Trimmethylethylene is an alkene hydrocarbon with the molecular formula C 5 H 10. Used as a free radical scavenger in trichloromethane (chloroform) and dichloromethane (methylene chloride). It is also used to scavenge hypochlorous acid (HOCl) in the Pinnick oxidation.
For example, the relative rates of epoxidation increase upon methyl substitution of the alkene (the methyl groups increase the electron density of the double bond by hyperconjugation): ethylene (1, no methyl groups), propene (24, one methyl group), cis-2-butene (500, two methyl groups), 2-methyl-2-butene (6500, three methyl groups), 2,3 ...
For example, of the isomers of butene, the two methyl groups of (Z)-but-2-ene (a.k.a. cis-2-butene) appear on the same side of the double bond, and in (E)-but-2-ene (a.k.a. trans-2-butene) the methyl groups appear on opposite sides. These two isomers of butene have distinct properties.
This is a thermodynamic argument, and kinetics are ignored. As determined by the enthalpies below the corresponding molecules, the enthalpy of reaction for 2-methyl-1-butene going to 2-methyl-butane is −29.07 kcal/mol, which is in great agreement with the value calculated from NIST, [15] −28.31 kcal/mol. For 2-butanone going to 2-butanol ...
6.1: Nitrocresols: UN 2447: 4.2: Phosphorus white, molten UN 2448: 4.1: Sulfur, molten UN 2449? (UN No. no longer in use) Oxalates (UN No. no longer in use) [2] UN 2450? (UN No. no longer in use) UN 2451: 2: Nitrogen trifluoride, compressed UN 2452: 2: Ethylacetylene, inhibited UN 2453: 2: Ethyl fluoride or Refrigerant gas R 161 UN 2454: 2 ...
The first step in the synthesis of dinoseb is the synthesis of 2-(1-methylpropyl)phenol from 1-butene and phenol. [20] First, 1-butene is protonated so that a secondary carbocation is formed. This can only happen under acidic conditions. The formed carbocation can undergo electrophilic aromatic substitution with phenol. The product of this ...