3170-79-4

Basic information

• Product Name: heptafluoropropyl
• Synonyms: heptafluoropropyl;Propyl,heptafluoro
• CAS NO: 3170-79-4
• Molecular Formula: C₃F₇
• Molecular Weight: 169.0209
• Mol File: 3170-79-4.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: heptafluoropropyl(CAS DataBase Reference)
• NIST Chemistry Reference: heptafluoropropyl(3170-79-4)
• EPA Substance Registry System: heptafluoropropyl(3170-79-4)

Safety Data

• Hazardous Substances Data: 3170-79-4(Hazardous Substances Data)

Upstream product

• 754-34-7 1,1,1,2,2,3,3-heptafluoro-3-iodo-propane 
• 2252-84-8 HFC-227ca 
• 378-90-5 perfluoro-4-heptanone 
• 336-64-1 bis(heptafluorobutyryl) peroxide 

Downstream Products

• 754-34-7 1,1,1,2,2,3,3-heptafluoro-3-iodo-propane 

Relevant articles and documents

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Direct measurements of C3F7I dissociation rate constants using a shock tube ARAS technique

This work presents the first direct experimental study on the thermal unimolecular decomposition of n-C3F7I. Experiments were performed behind incident and reflected shock waves using the atomic resonance absorption spectroscopy (ARAS) technique on a resonant line of atomic iodine at 183.04?nm. The reaction C3F7I?+?Ar?→?C3F7?+?I?+?Ar?(1) was studied at specific temperature (800–1200?K) and pressure (0.6–8.3?bar) ranges. Under experimental conditions, the obtained values of the rate constant at temperatures below 950?K are close to the high-pressure limit; however, considering theoretical calculations, the influence of pressure on the rate constant at elevated temperatures remains noticeable. The resulting value of the experimental rate constant of reaction 1 is presented in the following Arrhenius form: 1st(±30%) = 1.05×1014 exp(?200.4kJ?mol?1∕)(s?1). Experimental data were found to correlate with the results of the Rice–Ramsperger–Kassel–Marcus –master equation analysis based on quantum-chemical calculations. The following low- and high-pressure limiting rate coefficients were obtained over the temperature range T?=?300–3000?K: (Formula presented.). with the center broadening factor Fc?=?0.119.

Dissociation dynamics of fluorinated alkyl iodides at 222 and 236 nm

I*(2P1/2) quantum yield has been measured for a series of fluorinated alkyl iodides at two different wavelengths in the blue wing of their A-band. The yields are much higher for the fluorinated iodides than their corresponding alkyl iodide analogs at 222 as well as 236 nm. The I* quantum yield at 222 nm is, in general, larger than that at 236 nm which is opposite to what has been found in normal alkyl iodide dissociation in the A-band. This difference in fluorinated iodides has been explained by invoking the participation of the B-band states in the dissociation dynamics.

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α-Branched-perfluorodiacyl peroxides: Preparation and characterization

New perfluorodiacyl peroxides substituted at the α position have been synthesized and characterized. This class of peroxides shows good hydrolytic stability.