ChemicalBook--->CAS DataBase List--->137-43-9

137-43-9

137-43-9 Structure

137-43-9 Structure
IdentificationMore
[Name]

Cyclopentyl bromide
[CAS]

137-43-9
[Synonyms]

AKOS BBS-00004279
BROMOCYCLOPENTANE
CYCLOPENTYL BROMIDE
bromo-cyclopentan
Bromocylopentane
Cyclopentane,bromo-
Cyclopentane Bromide
Bromocyclopentane,98%
1-Bromocyclopentane
BROMOCYCLOPENTANE, STAB.
CYCLOPENTYL BROMIDE, 98+%
1-BROMOPENTAMETHYLENE
[EINECS(EC#)]

205-294-6
[Molecular Formula]

C5H9Br
[MDL Number]

MFCD00001359
[Molecular Weight]

149.03
[MOL File]

137-43-9.mol
Chemical PropertiesBack Directory
[Appearance]

Colorless to yellow liquid
[Boiling point ]

137-139 °C (lit.)
[density ]

1.39 g/mL at 25 °C(lit.)
[refractive index ]

n20/D 1.4881(lit.)
[Fp ]

95 °F
[storage temp. ]

Store at R.T.
[solubility ]

Chloroform, Ethyl Acetate (Slightly)
[form ]

Liquid
[color ]

Clear yellow to light brown
[Specific Gravity]

1.39
[Stability:]

Stable. Flammable. Incompatible with strong oxidizing agents, strong bases.
[Water Solubility ]

Immiscible with water.
[Detection Methods]

GC
[BRN ]

1209256
[InChIKey]

BRTFVKHPEHKBQF-UHFFFAOYSA-N
[LogP]

2.745 (est)
[CAS DataBase Reference]

137-43-9(CAS DataBase Reference)
[NIST Chemistry Reference]

Cyclopentane, bromo-(137-43-9)
[EPA Substance Registry System]

137-43-9(EPA Substance)
Safety DataBack Directory
[Risk Statements ]

R10:Flammable.
[Safety Statements ]

S23:Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer) .
S24/25:Avoid contact with skin and eyes .
S16:Keep away from sources of ignition-No smoking .
[RIDADR ]

UN 1993 3/PG 3
[WGK Germany ]

3
[F ]

8
[TSCA ]

Yes
[HazardClass ]

3
[PackingGroup ]

III
[HS Code ]

29035990
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Cyclopentanone-->Cyclopentanol-->Cyclopentane-->Cyclopentene, 4-bromo--->1,2-Dibromocyclopentane-->IODOCYCLOPENTANE-->1,2-dibromocyclopentane-->Cyclopentyl methyl ether-->Cyclopentene-->Cyclobutanemethanol-->1,3-Cyclopentadiene
[Preparation Products]

3-CYCLOPENTYLOXY-4-METHOXYBENZALDEHYDE-->CYCLOPENTYLACETIC ACID-->Diethyl cyclopentylmalonate-->Cyclopentanemalonic acid-->Quinestrol-->1-Bromobutane-->2-FLUOROPHENYL CYCLOPENTYL KETONE-->(R)-3-(4-broMo-1H-pyrazol-1-yl)-3-cyclopentylpropanenitrile-->DL-Cyclopentylglycine-->S- (+)-Rolipram
Material Safety Data Sheet(MSDS)Back Directory
[msds information]

Cyclopentyl bromide(137-43-9).msds
Hazard InformationBack Directory
[Chemical Properties]

Bromocyclopentane is a colorless to light yellow liquid at standard temperature and pressure.It has an aroma similar to camphor. It turns brown after a long time. Soluble in ethanol, ether, insoluble in water. Halocyclopentanes can be prepared by reacting the corresponding alcohols with thionyl halides, phosphorus trihalides or hydrohalic acids.
[Uses]

Bromocyclopentane is a precursor used in the preparation of cyclopentene and cyclopentanol. It is a fatty bromide, which is used as a solvent. It is used as an intermediate for the preparation of surfactant and pharmaceuticals and other organic compounds. It is also used in the production of the medicine cyclopentathiazide.
[Preparation]

Bromocyclopentane is synthesized by bromination of cyclopentanol: cyclopentanol is mixed with hydrobromic acid and heated to about 170°C refluxed for 6-8h. Then distilled with water steam, the oil layer is washed with 5% sodium carbonate, then dried, filtered, fractionated and collected 136-139°C fraction is the finished product. Another method is by the reaction of cyclopentanol and phosphorus tribromide: the cyclopentanol is cooled to 0 ℃, add the newly evaporated phosphorus tribromide drop by drop, add it all at 0-5 ℃, stir for 2h, and leave it at room temperature overnight. Add water and stratify, take the oil layer water distillation. Distillate stratification, the oil layer was washed with 10% sodium bicarbonate solution, dried with anhydrous calcium chloride, filtration, filtrate distillation, collect 134-141 ℃ fraction that is bromocyclopentane.
[Reactions]

Bromocyclopentane (22.0 g, 0.15 mol) was added to a soln of NaNO2 (18 g, 0.26 mol) in dry DMSO (100 mL) at 15 ℃ and the mixture was stirred at this temperature for 3 h. The mixture was poured into ice water (250 mL) and extracted with petroleum ether (bp 35-37 ℃; 4 × 50 mL). The combined organic extracts were washed with H2O (4× 50 mL), dried (MgSO4), and concentrated under reduced pressure. The residue was distilled to give Nitrocyclopentane; yield: 9.9 g (58%); bp 62 ℃/8 Torr; nD/20 1.4538.
Synthesis of Nitrocyclopentane
Synthesis of Nitrocyclopentane
[Synthesis Reference(s)]

The Journal of Organic Chemistry, 54, p. 1463, 1989 DOI: 10.1021/jo00267a047
Spectrum DetailBack Directory
[Spectrum Detail]

Bromocyclopentane(137-43-9)MS
Bromocyclopentane(137-43-9)1HNMR
Bromocyclopentane(137-43-9)13CNMR
Bromocyclopentane(137-43-9)IR1
Bromocyclopentane(137-43-9)IR2
Bromocyclopentane(137-43-9)Raman
Bromocyclopentane(137-43-9)ESR
Well-known Reagent Company Product InformationBack Directory
[Acros Organics]

Cyclopentyl bromide, 98%(137-43-9)
[Alfa Aesar]

Bromocyclopentane, 98+%(137-43-9)
[Sigma Aldrich]

137-43-9(sigmaaldrich)
[TCI AMERICA]

Bromocyclopentane,>98.0%(GC)(137-43-9)
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