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137-43-9
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Basic Information
CAS No.: 137-43-9
Name: Bromocyclopentane
Article Data: 59
Molecular Structure:
Molecular Structure of 137-43-9 (Bromocyclopentane)
Formula: C5H9Br
Molecular Weight: 149.03
Synonyms: Cyclopentane,bromo-;Cyclopentyl bromide;NSC 1110;AI3-23448;
EINECS: 205-294-6
Density: 1.445 g/cm3
Melting Point: 137-139ºC
Boiling Point: 135 °C at 760 mmHg
Flash Point: 35 °C
Solubility: Immiscible with water.
Appearance: colorless to yellow liquid
Hazard Symbols: R10:;
Risk Codes: 10
Safety: 23-24/25-16
Transport Information: UN 1993 3/PG 3
PSA: 0.00000
LogP: 2.32390
Related products
Synthetic route
287-92-3

Cyclopentane

137-43-9

Cyclopentyl bromide

Conditions
ConditionsYield
With bromine; aluminium trichloride; Acetyl bromide In pentane at 0℃; for 1.83333h;100%
With bromine; aluminium trichloride; Acetyl bromide In pentane at 0℃; for 1.83333h; Product distribution; ionic bromination of other cycloalkanes and n-alkanes with various catalysts and at different temperatures;100%
With bromine; sodium t-butanolate In cyclohexane Heating;100%

5-Cyclopentyloxy-thianthren-5-ium; perchlorate

A

137-43-9

Cyclopentyl bromide

B

2362-50-7

thianthrene-5-oxide

C

142-29-0

cyclopentene

D

92-85-3

Thianthrene

Conditions
ConditionsYield
With 18-crown-6 ether; potassium bromide Product distribution; Substitution; elimination;A 89%
B 100%
C 1.5%
D 3.5%
...Expand
96-41-3

Cyclopentanol

137-43-9

Cyclopentyl bromide

Conditions
ConditionsYield
With t-butyl bromide; n-pentylmethylimidazolium bromide for 2h; sonication;82%
With sulfuric acid; hydrogen bromide at 100℃;
With hydrogen bromide at 100℃;
287-92-3

Cyclopentane

A

137-43-9

Cyclopentyl bromide

B

96-41-3

Cyclopentanol

Conditions
ConditionsYield
With [FeIV(1,1-di(pyridin-2-yl)-N,N-bis(quinolin-2-ylmethyl)methanamine)(O)]2+; [FeII(1,1-di(pyridin-2-yl)-N,N-bis(quinolin-2-ylmethyl)methanamine)(Br)]Br In acetonitrile at 25℃; for 0.5h; Inert atmosphere; Glovebox;A 52%
B n/a
4415-82-1

cyclobutanemethanol

137-43-9

Cyclopentyl bromide

Conditions
ConditionsYield
With hydrogen bromide
75-62-7

Bromotrichloromethane

185-94-4

bicyclo[2.1.0]pentane

A

137-43-9

Cyclopentyl bromide

B

1781-66-4

cyclopent-3-enyl bromide

17827-32-6, 19640-06-3

trans-1-bromo-2-(trichloromethyl)cyclopentane

10230-26-9

trans-1,2-dibromocyclopentane

14376-82-0, 37722-39-7, 89180-35-8

trans-1-bromo-2-chlorocyclopentane

14376-82-0, 37722-39-7, 89180-35-8

cis-1-bromo2-chlorocyclopentane

Conditions
ConditionsYield
for 4h; Product distribution; Mechanism; Ambient temperature; Irradiation; Effect of added t-butyl hypochlorite;
...Expand
287-92-3

Cyclopentane

A

123-56-8

Succinimide

B

137-43-9

Cyclopentyl bromide

C

3234-49-9

1,2-dibromopentane

D

18926-24-4

3-bromopropanoyl isocyanate

Conditions
ConditionsYield
With N-Bromosuccinimide; cyclohexane In acetonitrile at 23℃; for 16h; Product distribution; Mechanism; Irradiation; Effect of solvent on the Relative Rates of Bromination; Effect of Added Bromine; Effect of Added Olefine (C2H4);
...Expand
287-92-3

Cyclopentane

A

137-43-9

Cyclopentyl bromide

B

29974-65-0

1,2-dibromo-cyclopentane

Conditions
ConditionsYield
With N-Bromosuccinimide; bromine In dichloromethane; cyclohexane at 15℃; Product distribution; Mechanism; Irradiation; relative reactivity; other cycloalkanes; other bromination agents; var temp.;A 37.6 % Chromat.
B 13.7 % Chromat.
With hydrogen bromide; dihydrogen peroxide In water at 50℃; for 6h; Irradiation;A 64.3 %Spectr.
B 15 %Spectr.
1556-18-9

cyclopentyl iodide

137-43-9

Cyclopentyl bromide

Conditions
ConditionsYield
With iodobenzene; tetrabutylammomium bromide In tetrachloromethane; acetonitrile at 25℃; Rate constant;
185-94-4

bicyclo[2.1.0]pentane

A

137-43-9

Cyclopentyl bromide

B

68479-47-0

cis-1,3-dibromocyclopentane

10230-26-9

trans-1,2-dibromocyclopentane

68479-48-1

trans-1,3-dibromocyclopentane

Conditions
ConditionsYield
With bromine In tetrachloromethane at 0℃; Product distribution; Mechanism;
...Expand
Raw Materials
185-94-4
542-92-7
4415-82-1
75-62-7
142-29-0
96-41-3
10035-10-6
1556-18-9
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197573-17-4
26306-40-1
25291-41-2
21823-29-0
30762-02-8
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Chemistry

Molecule structure of Bromocyclopentane (CAS NO.137-43-9):

IUPAC Name: Bromocyclopentane 
Molecular Weight: 149.02896 g/mol
Molecular Formula: C5H9Br 
Density: 1.445 g/cm3 
Boiling Point: 135 °C at 760 mmHg 
Flash Point: 35 °C
Index of Refraction: 1.51
Molar Refractivity: 30.84 cm3
Molar Volume: 103 cm3
Surface Tension: 35.4 dyne/cm 
Enthalpy of Vaporization: 35.71 kJ/mol
Vapour Pressure: 9.73 mmHg at 25 °C 
Storage Temp.: store at R.T.
Stability: stable. flammable. incompatible with strong oxidizing agents, strong bases.
XLogP3-AA: 2.3
Exact Mass: 147.988763
MonoIsotopic Mass: 147.988763
Canonical SMILES: C1CCC(C1)Br
InChI: InChI=1S/C5H9Br/c6-5-3-1-2-4-5/h5H,1-4H2
InChIKey: BRTFVKHPEHKBQF-UHFFFAOYSA-N
EINECS: 205-294-6
Product Categories: Pharmaceutical Intermediates; CHLORO ALKANE COMPOUNDS

Uses

 Bromocyclopentane (CAS NO.137-43-9) is used as a solvent. It is used as an intermediate to manufacture surfactant, pharmaceuticals and other organic compounds.

Safety Profile

Risk Statements: 10 
R10:Flammable.
Safety Statements: 23-24/25-16 
S23:Do not breathe vapour. 
S24/25:Avoid contact with skin and eyes. 
S16:Keep away from sources of ignition.
RIDADR: UN 1993 3/PG 3
WGK Germany: 3
F: 8
HazardClass: 3
PackingGroup: III
HS Code: 29035990

Standards and Recommendations

APPEARANCE: clear to yellow liquid
CONTENT: 98.0% min
WATER: 0.1% max

Specification

 Bromocyclopentane (CAS NO.137-43-9) is also named as AI3-23448 ; Cyclopentyl bromide ; NSC 1110 ; Cyclopentane, bromo- . Bromocyclopentane (CAS NO.137-43-9) is colorless to yellow liquid.