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Most 1-bromoalkanes are prepared by free-radical addition of hydrogen bromide to the 1-alkene. These conditions lead to the anti-Markovnikov addition, i.e. give the 1-bromo derivatives. [2] 1-Bromobutane can also be prepared from butanol by treatment with hydrobromic acid: [3] CH 3 (CH 2) 3 OH + HBr → CH 3 (CH 2) 3 Br + H 2 O
2-Butyne is of interest to physical chemists because of its very low torsional barrier and the problem of determining that barrier using high-resolution infrared spectroscopy. Analysis of its spectrum [3] leads to a determination that the torsional barrier is only 6 cm −1 (1.2 × 10 −22 J or 72 J mol −1).
C 2 H 5 Br: Molar mass: 108.966 g·mol −1 Appearance Colorless liquid Odor: ether-like Density: 1.46 g mL −1: Melting point: −120 to −116 °C; −184 to −177 °F; 153 to 157 K Boiling point: 38.0 to 38.8 °C; 100.3 to 101.8 °F; 311.1 to 311.9 K
Molar mass: 151.047 g·mol −1 Appearance colorless liquid Density: 1.199 g mL −1 [2] Melting point: −105.5 °C; −157.8 °F; 167.7 K ... 1-Bromo-2,2 ...
2-Bromobutane is an isomer of 1-bromobutane. Both compounds share the molecular formula C 4 H 9 Br. 2-Bromobutane is also known as sec-butyl bromide or methylethylbromomethane. Because it contains bromine, a halogen, it is part of a larger class of compounds known as alkyl halides. It is a colorless liquid with a pleasant odor.
132.42 J/(mol K) –262 °C to –3 °C Gas properties Std enthalpy change of formation, Δ f H o gas –124.7 kJ/mol Standard molar entropy, S o gas: 310.23 J/(mol K) Enthalpy of combustion, Δ c H o –2877.5 kJ/mol Heat capacity, c p: 98.49 J/(mol K) at 25 °C n-butane van der Waals' constants [3] a = 1466.2 L 2 kPa/mol 2 b = 0.1226 liter ...
tert-Butyl bromide (also referred to as 2-bromo-2-methylpropane) is an organic compound with the formula Me 3 CBr (Me = methyl). The molecule features a tert-butyl group attached to a bromide substituent. This organobromine compound is used as a standard reagent in synthetic organic chemistry. It is a colorless liquid.
But-2-ene is an acyclic alkene with four carbon atoms. It is the simplest alkene exhibiting cis/trans-isomerism (also known as (E/Z)-isomerism); that is, it exists as two geometric isomers cis-but-2-ene ((Z)-but-2-ene) and trans-but-2-ene ((E)-but-2-ene). It is a petrochemical, produced by the catalytic cracking of crude oil or the dimerization ...