5398-70-9

Basic information

• Product Name: 1,1-dibromo-2-butylcyclopropane
• Synonyms: 1,1-Dibromo-2-butylcyclopropane; Cyclopropane, 1,1-dibromo-2-butyl-
• CAS NO: 5398-70-9
• Molecular Formula: C₇H₁₂Br₂
• Molecular Weight: 255.9782
• Mol File: 5398-70-9.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 212.6°C at 760 mmHg
• Flash Point: 84.9°C
• Density: 1.695g/cm³
• Vapor Pressure: 0.249mmHg at 25°C
• Refractive Index: 1.547
• CAS DataBase Reference: 1,1-dibromo-2-butylcyclopropane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1-dibromo-2-butylcyclopropane(5398-70-9)
• EPA Substance Registry System: 1,1-dibromo-2-butylcyclopropane(5398-70-9)

Safety Data

• Hazardous Substances Data: 5398-70-9(Hazardous Substances Data)

Usage

Physical state

Colorless, flammable liquid

Odor

Strong, irritating

Uses

a. Intermediate in the synthesis of pharmaceuticals
b. Synthesis of other organic compounds
c. Reagent in chemical reactions
d. Solvent in various industrial processes

Safety precautions

a. Toxic if swallowed
b. Toxic if inhaled
c. Toxic if absorbed through the skin
d. Potential damage to the respiratory system
e. Potential damage to the central nervous system

Handling

Handle with caution due to its toxic nature

Upstream product

• 592-41-6 1-hexene 
• 74-95-3 1,1-dibromomethane 
• 111-25-1 1-bromo-hexane 
• 592-76-7 1-Heptene 
• 75-25-2 Bromoform 

Downstream Products

• 930-57-4 n-butylcyclopropane 
• 108401-91-8 ((1R,2R)-1-Bromo-2-butyl-cyclopropyl)-phenyl-methanol 
• 100045-90-7 1,1-bis(phenylthio)-2-butylcyclopropane 
• 5365-17-3 2,2-dibromocyclopropane-1-carboxylic acid 
• 108401-94-1 E-1-benzoyl-1-bromo-2-butylcyclopropane 
• 108401-99-6 ((1S,2R)-2-Butyl-cyclopropyl)-phenyl-methanone 

Relevant articles and documents

Is a phase transfer catalyst really needed for gem-dihalocyclopropanation of alkenes with haloforms in the presence of alkali metal hydroxide?

Chloroform, bromoform and dibromochloromethane react with alkenes in the presence of cone. aq. sodium hydroxide, without phase-transfer catalyst, giving gem-dihalocyclopropanes. The process is particularly useful for preparation of gem-bromochlorocyclopropanes which are formed in good yields and in high selectivity.

Photochemical activation of metalloporphyrin carbene complexes

While the photochemistry of simple metalloporphyrin complexes has been explored to some extent, the photoactivation of multiple-bonded axial ligands coordinated to metalloporphyrins has not been previously examined. We report here the photochemistry of several iron porphyrin carbene and vinylidene complexes. Irradiation of these complexes with visible light cleaves the iron-carbon double bond and produces a four coordinate iron(II) porphyrin and a free carbene, which can be trapped in high yield with a variety of alkenes. This photochemistry is unique among organo transition metal complexes of carbenes or alkylidenes. For these metalloporphyrin carbene complexes, the presence of the porphyrin ring alters the photoreactivity of the metal-carbon bond. This is probably due to the mixing between the π * orbitals of the porphyrin ring and the iron-carbon orbitals, which is also responsible for the hypso-type spectrum (i.e. blue-shifted) seen in these complexes. Hypso spectra are a common trait in other photodissociative porphyrin complexes, most notably CO complexes.

New synthesis of β-lactams

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