690-39-1Relevant articles and documents
On the CH3/CF3 substitution effect. The gas-phase structure of 1,1,1,3,3,3-hexafluoropropane
Mack, Hans-Georg,Oberhammer, Heinz,Grosser, Martin,Dakkouri, Marwan
, p. 135 - 142 (1992)
The gas-phase structure of CF3CH2CF3 was determined by electron diffraction.The experimental intensities are consistent with a structure possessing C2v symmetry and the following geometric parameters (ra distances in Angstroem and α angles in degrees, error limits are 3? values): C-H=1.082 (18), C-C=1.518 (4), C-F=1.333 (2), CCC=113.9 (6), FCF=107.7 (1) and HCH=108.7 (not refined).The CF3 groups are tilted by 1.8 (8) deg away from each other.Comparison of these results with the structures of propane, 2-fluoropropane, 2.2-difluoropropane and perfluoropropaneallows a discussion of the effects of fluorination on the C-C- bond lengths and CCC bond angles in this series.The geometries of these compounds have been optimized by ab initio calculations in the HF approximation using different basis sets (3-21G, 6-31G* and 6-311G*).The effect of CH3/CF3 substitution on the C-C-bond lengths is reproduced correctly only with basis sets including polarization functions.
Preparation method of 1, 1, 1, 3, 3, 3-hexafluoropropane
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Paragraph 0043-0046, (2019/05/08)
The invention discloses a preparation method of 1, 1, 1, 3, 3, 3-hexafluoropropane. The method includes: (1) reacting a halogenated inorganic salt with heptafluoroisobutenyl methyl ether in an aproticsolvent, then adding water and performing stirring, conducting cooling and filtering, and rectifying the filtrate to obtain hexafluoroisobutyric acid; and (2) heating the hexafluoroisobutyric acid obtained in step (1), collecting the generated gaseous product and performing cooling to obtain the 1, 1, 1, 3, 3, 3-hexafluoropropane product. The method provided by the invention has the advantages ofsimple process, environmental friendliness, low cost, green and environmental protection.
Method for co-preparation of 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene from hexafluoropropylene
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Paragraph 0160; 0161; 0162; 0163, (2017/01/05)
2, 3, 3, 3-hexafluoro propylene, the 1, 3, 3, 3-and -1234z3 (HFO-1234yf) (HFP) from -1234z3 (HFO-1234ze, E-form) simultaneous manufacturing method is provided. (by machine translation)