中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-三氟甲基-1,1,1,3,3,3-六氟丙烷 | 1,1,1,3,3,3-hexafluoro-2-trifluoromethyl-propane | 382-24-1 | C4HF9 | 220.038 |
—— | 1,2-dichloro-1,1,3,3,3-pentafluoro-2-trifluoromethyl-propane | 354-91-6 | C4Cl2F8 | 270.937 |
The addition reaction R2EX + CF3C≡CCF3 → R2EC(CF3)=C(CF3)X has been investigated further (E = P and N); 1:1 adducts have been obtained from (C2H5)2PH, (CF3)2PH, (C6H5)2P—P(C6H5)2, and (CH3)2NCl, but not from (CH3)2PCl or (CH3)2P—P(CH3)2. (CF3)2PH also gives a 2:1 adduct. Triphenylphosphine causes the butyne to polymerize at − 78°. A similar but slower reaction takes place with trimethylamine. In the presence of water, trimethylamine and the butyne give the bis(butenyl) ether cis,trans (CF3CH=CCF3)2O as the major product.