372-90-7

Basic information

• Product Name: 1,4-DIFLUOROBUTANE
• Synonyms: 1,4-DIFLUOROBUTANE;1,4-difluoro-butan
• CAS NO: 372-90-7
• Molecular Formula: C₄H₈F₂
• Molecular Weight: 94.1
• Mol File: 372-90-7.mol
• Article Data: 5

Chemical Properties

• Melting Point: 77.8 °C
• Boiling Point: 77.8°C
• Appearance: /
• Density: 0.977
• Vapor Pressure: 96.5mmHg at 25°C
• Refractive Index: 1.3433
• CAS DataBase Reference: 1,4-DIFLUOROBUTANE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,4-DIFLUOROBUTANE(372-90-7)
• EPA Substance Registry System: 1,4-DIFLUOROBUTANE(372-90-7)

Safety Data

• Hazard Codes: Xi
• Safety Statements: 23-24/25
• HazardClass: IRRITANT
• Hazardous Substances Data: 372-90-7(Hazardous Substances Data)

Usage

General Description

1,4-Difluorobutane is a colorless, flammable gas with the chemical formula C4H8F2. It is an organic compound that is commonly used as a refrigerant because of its low boiling point and its ability to efficiently transfer heat. It is also used as a blowing agent in the production of foam materials and as a propellant in aerosol cans. However, 1,4-difluorobutane is considered a greenhouse gas and has a high global warming potential, so there are efforts to find more environmentally friendly alternatives for its various industrial applications. Inhaling or ingesting this chemical can cause irritation to the respiratory system and is considered harmful if inhaled or swallowed.

InChI:InChI=1/C4H8F2/c5-3-1-2-4-6/h1-4H2

Upstream product

• 107-21-1 ethylene glycol 
• 110-56-5 1,4-dichlorobutane 
• 110-63-4 Butane-1,4-diol 
• 71742-07-9 2,4,6,2',4',6'-hexaphenyl-1,1'-butane-1,4-diyl-bis-pyridinium; difluoride 
• 353-36-6 1-fluoroethane 
• 110-52-1 1,4-dibromo-butane 
• 109-99-9 tetrahydrofuran 

Relevant articles and documents

INFRARED AND RAMAN SPECTROSCOPIC STUDIES ON MOLECULAR CONFORMATIONS OF F(CH2)nF (n=3-6)

The infrared and Raman spectra of F(CH2)nF (n=3-6) were measured and analyzed on the basis of the normal coordinate treatment.The spectral analyses indicated that the molecule in the solid state takes the gauche-gauche conformation for n=3, gauche-trans-gauche' for n=4, gauche-trans-trans-gauche for n=5, and gauche-trans-trans-trans-gauche' for n=6.

Reaction of diethylaminosulfur trifluoride with diols

Diethylaminosulfur trifluoride (DAST) reacts with dialcohols to give difluorides, sulfite esters or cyclic ethers depending on the number of carbons separating the two alcohol groups.Vicinal and 1,3-diols give large amounts of sulfite ester products while butane-1,4-diol gives almost exclusively the cyclic ether tetrahydrofuran.Terminal dialcohols longer than four carbons give primarily difluoride products.Semiempirical calculations indicate a preference for cyclic intermediates when four or less carbons separate the two alcohol moieties.These cyclic intermediates lead directly to the cyclic ethers and sulfite ester products.

Reaction of OH with CH3CH2F. The Extent of H Abstraction from the α and β Positions

The mechanism of the reaction of OH radicals with C2H5F was determined from the yields of the reaction products.Hydroxyl radicals were generated in the gas phase by photolysis of H2O at 184.9 nm, and products were analyzed by gas chromathography and mass spectrometry.The reaction proceeds by abstraction of hydrogen primarily from the α position, and the major products were meso- and d,l-2,3-C4H8F2, 1,3-C4H8F2, 2-C4H9F, and H2.The minor products were 1,4-C4H8F2, 1-C4H9F, 1-and 2-C3H7F, C2H6, C2H4, C2H3F, and C2H2.It was found that kinetically hot H atoms formed in the photolysis of H2O abstract hydrogen to some extent at the β position of C2H5F in contrast to thermal H atoms which abstract exclusively at the α position.After correction for the effects of H atom reactions, it was estimated that 85+/-3percent of the abstraction by occurs at the α position of C2H5F.