tert -butyl bromide

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Structural formula
Structural formula of tert-butyl bromide
General
Surname tert -butyl bromide
other names
  • 2-bromo-2-methylpropane
  • Trimethylbromomethane
Molecular formula C 4 H 9 Br
Brief description

colorless liquid with a characteristic odor

External identifiers / databases
CAS number 507-19-7
EC number 208-065-9
ECHA InfoCard 100.007.333
PubChem 10485
Wikidata Q256982
properties
Molar mass 137.02 g mol −1
Physical state

liquid

density

1.2125 g cm −3

Melting point

−16.2 ° C

boiling point

73.3 ° C

Vapor pressure

179.9 mbar (25 ° C)

solubility

practically insoluble in water (20 ° C)

Refractive index

1.4279 (20 ° C, 589 nm)

safety instructions
GHS labeling of hazardous substances
02 - Highly / extremely flammable

danger

H and P phrases H: 225
P: 210
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

tert -Butyl bromide is an organic compound with a bromine atom as a substituent and a tertiary carbon atom . As an alkyl bromide , thecompound isone of the halogenated hydrocarbons and is used, for example, as a starting material for synthesis. Isomers are 1-bromobutane , 2-bromobutane and 1-bromo-2-methylpropane , which together form the group of butyl bromides .

Extraction and presentation

One way of showing this is the reaction of tert- butanol with hydrogen bromide . Another is the reaction of isobutane with bromine.

properties

tert -Butyl bromide is a very volatile, colorless liquid with a characteristic odor, which is practically insoluble in water. It is rapidly hydrolyzed to tert -butanol and hydrogen bromide when mixed with water . If it is dissolved in methanol , it reacts quickly to form 2-methoxy-2-methylpropane (by solvolysis ) and 2-methylpropene . The technical product is stabilized with potassium carbonate .

Individual evidence

  1. ↑ a b c d e f g h i Entry on 2-bromo-2-methylpropane in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .
  2. ↑ a b Data sheet 2-bromo-2-methylpropane (PDF) from Merck , accessed June 30, 2012.
  3. ↑ a b Joachim Buddrus, Bernd Schmidt: Fundamentals of organic chemistry . Walter de Gruyter, 2011, ISBN 3-11-024894-8 , p. 260 ( limited preview in Google Book Search).
  4. ↑ Uni-Tübingen: Halogenalkane ( Memento from June 26, 2013 in the Internet Archive ) (PDF file; 464 kB).