I found the field of Chemistry very interesting. Saw the article Pentafluoroethylation of Carbonyl Compounds by HFC-125 via the Encapsulation of the K Cation with Glymes published in 2021. SDS of cas: 119-61-9, Reprint Addresses Shibata, N (corresponding author), Nagoya Inst Technol, Dept Life Sci & Appl Chem, Nagoya, Aichi 4668555, Japan.; Shibata, N (corresponding author), Nagoya Inst Technol, Dept Nanopharmaceut Sci, Nagoya, Aichi 4668555, Japan.; Shibata, N (corresponding author), Zhejiang Normal Univ, Inst Adv Fluorine Containing Mat, Jinhua 321004, Zhejiang, Peoples R China.. The CAS is 119-61-9. Through research, I have a further understanding and discovery of Benzophenone
A simple protocol to overcome the explosive pentafluoroethylation of carbonyl compounds by HFC-125 is described. The use of potassium (K) bases with triglyme or tetraglyme as a solvent safely yields the pentafluoroethylation products in good to high yields. The experimental results suggest that an encapsulation of the K cation by glymes as K(glyme)(2) inhibits the contact between the K cation and the reactive anionic pentafluoroethyl counterion, preventing their transformation into KF and explosive tetrafluoroethylene (TFE). The generation of sterically demanding [K(G3)(2)](+) and [K(G4)(2)](+) is an effective way as an unstable pentafluoroethyl anion reservoir.
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Reference:
Thiomorpholine – Wikipedia,
,Thiomorpholine | C4H9NS – PubChem