29974-65-0

Basic information

• Product Name: 1,2-Dibromocyclopentane
• Synonyms: 1,2-Dibromocyclopentane
• CAS NO: 29974-65-0
• Molecular Formula: C₅H₈Br₂
• Molecular Weight: 227.92502
• Mol File: 29974-65-0.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 196.9°Cat760mmHg
• Flash Point: 71.5°C
• Appearance: /
• Density: 1.94g/cm³
• Storage Temp.: 2-8°C
• CAS DataBase Reference: 1,2-Dibromocyclopentane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Dibromocyclopentane(29974-65-0)
• EPA Substance Registry System: 1,2-Dibromocyclopentane(29974-65-0)

Safety Data

• Hazardous Substances Data: 29974-65-0(Hazardous Substances Data)

Usage

Physical state

Colorless liquid

Family

Cyclopentane family

Bromine attachment

Two bromine atoms at the 1 and 2 positions on the cyclopentane ring

Usage

a. Organic synthesis
b. Precursor to other chemical compounds
c. Building block in the synthesis of pharmaceuticals, agrochemicals, and fine chemicals

Flammability

Flammable

Safety precautions

Handle with care due to potential health and environmental hazards

Upstream product

• 137-43-9 Cyclopentyl bromide 
• 75-05-8 acetonitrile 
• 287-92-3 Cyclopentane 

Downstream Products

• 97078-05-2 1,2-bis-phenylcarbamoyloxy-cyclopentane 
• 285-67-6 Cyclopentene oxide 
• 142-29-0 cyclopentene 
• 542-92-7 cyclopenta-1,3-diene 
• 5057-99-8 trans-cyclopentane-1,2-diol 
• 4065-92-3 cyclopentane-1,2-diol 

Relevant articles and documents

Highly efficient oxidative bromination of alkanes with the HBr-H 2O2 system in the presence of catalyst

Various cycloalkanes and straight-chain alkanes were efficiently brominated with an aqueous HBr-H2O2 system. This oxidative brominating process was promoted by catalysis and irradiation with light. The cycloalkanes were converted to the corresponding bromo-cycloalkanes in moderate yields and the straight-chain alkanes produced dominantly secondary bromides. This simple but effective bromination method of alkanes is characterized by high atom efficiency, inexpensive reagents and the absence of organic waste, which make it a good alternative to the existing method for Ci￡H activation through bromination. A simple, effective, environmentally friendly method was researched for bromination of alkanes in good yield with HBr as the origin of bromine.

The Effect of Electrochemically Generated Positive Bromine Species in Acetonitrile on the Cleavage of C-Br and C-Cl Bonds.

The fate of bromine formed from C-Br cleavage during the course of anodic oxidation of alkyl bromides in acetonitrile on platinum has been investigated potentiostatically.It is suggested that positive bromine species are formed and they are potentially reactive towards alkyl bromides, yielding similar products to those obtained by direct anodic oxidation of the same bromides.Furthermore, whereas alkyl chlorides do not undergo C-Cl fission by direct anodic oxidation it is shown that positive bromine species are energetically sufficient to break C-Cl bonds, although not very efficiently.We suggest that a possible structure for the complex between acetonitrile and positive bromine species is mainly +Br3- and the mechanism for its formation is discussed.The spectrum of this species found identical to that of Br3- (269 nm) in acetonitrile.