422-00-4Relevant academic research and scientific papers
Method For Producing Fluorinated Organic Compounds
-
Page/Page column 3, (2009/04/24)
Disclosed is a method for producing fluorinated organic compounds, including petnafluoropropenes, which preferably comprises converting at least one compound of formula (I): [in-line-formulae]CFnXmCFaXbCH2X??(I)[/in-line-formulae]to at least one compound of formula (II) [in-line-formulae]CF3CF═CHF??(II)[/in-line-formulae]where each X is independently Cl, I or Br; n is 2 or 3; m is 0 or 1, a is 1 or 2, b is 0 or 1, m+n=3 and a+b=2.
PROCESSES FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE, A PROCESS FOR PRODUCING 1-CHLORO-2,2,3,3,3-PENTAFLUOROPROPANE AND AZEOTROPIC COMPOSITIONS OF 1-CHLORO-2,3,3,3-TETRAFLUOROPROPENE WITH HF
-
Page/Page column 13-14, (2008/12/05)
A process is disclosed for making CH2=CFCF3. The process involves contacting CH2CICF2CF3 with H2 in a reaction zone in the presence of a catalyst including a catalytically effective amount of palladium supported on a support selected from chromium oxide, fluorinated chromium oxide, chromium fluoride, aluminum oxide, aluminum fluoride and/or fluorinated alumina, to produce CH2=CFCF3. The mole ratio of H2 to the CH2CICF2CF3 fed to the reaction zone is between about 1 :1 and about 4:1. Also disclosed is another process for making CH2=CFCF3 that involves (a) reacting CH2CICF2CF3 with H2 in the presence of a catalytically effective amount of hydrogenation catalyst to form CH3CF2CF3; and (b) dehydrofluorinating CH3CF2CF3 from (a) to form CH2=CFCF3;and another process for making CH2=CFCF3 that involves (1 ) dehydrofluorinating CH2CICF2CF3 in the presence of a catalytically effective amount of dehydrofluorination catalyst to form CHCI=CFCF3; and (2) hydrogenating CHCI=CFCF3 from (1 ) in the presence of a hydrogenation catalyst including a catalytically effective amount of palladium supported on a support selected from chromium oxide, fluorinated chromium oxide, chromium fluoride, aluminum oxide, aluminum fluoride and/or fluorinated alumina to form CH2=CFCF3. Also disclosed is a process for making CH2CICF2CF5. This process involves reacting CH2CIF with CF2=CF2 in a reaction zone in the presence of a catalytically effective amount of an aluminum halide composition having a bulk formula of AICIxBryF3-x-y wherein the average value of x is O to 3, the average value of y is O to 3-x, provided that the average values of x and y are not both O. Also disclosed is an azeotropic composition including CF3CF=CHCI and HF.
PROCESSES FOR PRODUCING 1,2,3,3,3-PENTAFLUOROPROPENE AND PRECURSORS THEREOF
-
Page/Page column 9-10, (2008/06/13)
A process is disclosed for making CH2CICF2CCIF2. The process involves reacting CH2CIF with CCIF=CF2 in an addition reaction zone in the presence of an aluminum halide composition having a bulk formula of AICIxBryF3-x-y wherein the average value of x is 0 to 3, the average value of y is 0 to 3-x, provided that the average values of x and y are not both 0. Also disclosed is a process for making CH2FCF2CF3 that involves reacting the CH2CICF2CCIF2 with HF in a fluorination reaction zone in the presence of a fluorination catalyst. Also disclosed is a process for making CHF=CFCF3 that involves dehydrofluorinating the CH2FCF2CF3.
19F nuclear magnetic resonance studies of halogenated propanes
Tanuma, T.,Ohnishi, K.,Okamoto, H.,Miyajima, T.,Morikawa, S.
, p. 259 - 284 (2007/10/02)
The relationship between 19F chemical shifts in halogenated propanes and their structures are elucidated using MNDO calculations to determine the population of rotamers.The pairs of atom gauche to a fluorine atom and van der Waals interaction between the two terminal substituents are responsible for the 19F chemical shifts.The differences among chemical shifts in diastereomers are also discussed in terms of the conformation of molecule.
