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1-Butene (IUPAC name: But-1-ene, also known as 1-butylene) is the organic compound with the formula CH 3 CH 2 CH=CH 2. It is a colorless gas. But-1-ene is an alkene easily condensed to give a colorless liquid. It is classified as a linear alpha-olefin (terminal alkene). [2] It is one of the isomers of butene (butylene). It is a precursor to ...
The branching in 2-ethyl-1-butanol makes it harder to crystallize due to packing disruption, which results in a very low freezing point. Esters of 2-ethyl-1-butanol are similarly effected and it therefore finds application as a feedstock in the production of plasticizers and lubricants, where its presence helps reduce viscosity and lower freezing points.
Most often, 1-pentene is made as a byproduct of catalytic or thermal cracking of petroleum or during the production of ethylene and propylene via thermal cracking of hydrocarbon fractions. As of 2010s, the only commercial manufacturer of 1-pentene was Sasol Ltd. , where it is separated from crude by the Fischer-Tropsch process .
2-methylprop-1-ene In the chemical structures above, the small blue numbers in the structure images are the numbering of the atoms in the main backbone chain of the molecules. Other organic compounds have the formula C 4 H 8 , namely cyclobutane and methylcyclopropane , but are not alkenes and do not fall under the name butene .
ch 2 =ch 2 + ch 3 ch=chch 3 → 2 ch 2 =chch 3 Transition metal catalyzed hydrovinylation is another important alkene synthesis process starting from alkene itself. [ 31 ] It involves the addition of a hydrogen and a vinyl group (or an alkenyl group) across a double bond.
Coefficients for partition between water and solvents wet/dry solvent c e s a b v source w 1-butanol: 0.376 0.434 -0.718 -0.097 -2.350 2.682 [1]w
[2] [5] The compound is used as a reactant in the synthesis of a number of compounds. Notably it is used to synthesize 2,3-dimethylbut-2-ene, and is then converted to 2,3-dimethylbutane-2,3-diol and methyl tert-butyl ketone, better known as pinacolone. Pinacolone itself is then used in synthesis for number of pesticides.
2 –H (2-butenoic) or HO(O=)C – CH 2 – CH=CH –H (3-butenoic). All have the chemical formula C 3 H 5 COOH or C 4 H 6 O 2. These compounds are technically mono-unsaturated fatty acids, although some authors may exclude them for being too short. The three isomers are: crotonic acid (trans-2-butenoic or (2E)-but-2-enoic acid)