19721-29-0

Basic information

• Product Name: Cyclopropene, tetrafluoro-
• CAS NO: 19721-29-0
• Molecular Formula: C3F4
• Molecular Weight: 112.027
• Mol File: 19721-29-0.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Cyclopropene, tetrafluoro-(CAS DataBase Reference)
• NIST Chemistry Reference: Cyclopropene, tetrafluoro-(19721-29-0)
• EPA Substance Registry System: Cyclopropene, tetrafluoro-(19721-29-0)

Safety Data

• Hazardous Substances Data: 19721-29-0(Hazardous Substances Data)

Upstream product

• 689-99-6 difluoroacetylene 
• 77547-36-5 3,4-Difluoro-3-cyclobutene-1,2-dione 
• 685-63-2 hexafluoro-1,3-butadiene 

Downstream Products

• 22947-62-2 2,2,3,4-Tetrafluor-bicyclo<3.2.1>octadien-(3,6) 
• 461-68-7 1,1,3,3-tetrafluoro-1,2-propadiene 
• 20174-11-2 1,3,3,3-tetrafluoropropyne 
• 699-39-8 perfluoro-1,3-cyclopentadiene 
• 19692-28-5 1,2,2,3-tetraphenylcyclopropene 
• 559-40-0 octaperfluorocyclopentene 

Relevant articles and documents

Squaric acid difluoride

Hitherto unknown squaric acid difluoride (3,4-difluoro-3-cyclobutene-1,2-dione) (1a) has been synthesized in 71% yield by gas phase fluorination of squaric acid dichloride (1c) with KF at 250°C. (1a) has been characterized by multinuclear NMR, mass, IR and Raman spectra. The IR spectrum is in excellent agreement with its ab initio prediction (MP2, 6-311 + G(2d, p)). The vacuum thermolysis of (1a) at 700°C does not yield the expected decarbonylation product FCCF (2a) although the precursor of the latter, F2CCCO, and three C3F4 isomers (propyne, allene, cyclopropene) which are also found as decomposition products of (2a) have been identified.

Isolation, Characterization and Some Properties of Free Difluoroethyne, FCCF

Difluoroethyne, FCCF 1, has been prepared by vacuum pyrolysis of perfluoro-1,2,3-triazine, isolated in pure form and characterized by 19F NMR and gas phase IR spectroscopy; its decomposition, with a half-life-time at 300 K and ca. 2.5 mbar of ca. 15 min, yields in the first step a polymer and :CF2, the latter either oligomerizing or reacting with 1 to form three different C3F4 isomers.