2-Bromobutane

2-Bromobutane
IUPAC name 2-Bromobutane[1]
Other names sec-Butylbromide
Identifiers
CAS number	78-76-2 Y
PubChem	6554, 637147 R, 12236140 S
ChemSpider	6306 Y, 552796 R Y
EC number	201-140-7
UN number	2339
MeSH	2-bromobutane
ChEMBL	CHEMBL156276 Y
RTECS number	EJ6228000
Beilstein Reference	505949
Jmol-3D images	Image 1
SMILES CCC(C)Br
InChI InChI=1S/C4H9Br/c1-3-4(2)5/h4H,3H2,1-2H3 Y Key: UPSXAPQYNGXVBF-UHFFFAOYSA-N Y
Properties
Molecular formula	C4H9Br
Molar mass	137.02 g mol−1
Appearance	Colourless liquid
Density	1.255 g mL−1
Melting point	−112.65 °C; −170.77 °F; 160.50 K
Boiling point	91 °C; 196 °F; 364 K
log P	2.672
Refractive index (nD)	1.437
Thermochemistry
Std enthalpy of formation ΔfHo298	−156 kJ mol−1
Std enthalpy of combustion ΔcHo298	−2.706–−2.704 MJ mol−1
Hazards
GHS pictograms
GHS signal word	DANGER
GHS hazard statements	H225
GHS precautionary statements	P210
EU classification	F
R-phrases	R11
S-phrases	S16, S24/25
Flash point	21 °C; 70 °F; 294 K
Related compounds
Related alkanes	n-Propyl bromide 2-Bromopropane tert-Butyl bromide 1-Bromobutane 1-Bromohexane 2-Bromohexane
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

2-Bromobutane is an isomer of 1-bromobutane. Both compounds share the molecular formula C₄H₉Br. 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. Because the carbon atom connected to the bromine is connected to two other carbons the molecule is referred to as a secondary alkyl halide.

2-Bromobutane is relatively stable, but is toxic and flammable. It is prone to undergo an E2 reaction if treated with a strong base, which is a bimolecular elimination which results in an alkene (double bond) product. 2-Bromobutane is an irritant, and harmful if ingested. It can irritate and burn skin and eyes.

References