Naming Epoxides Alkene oxide,from usual synthesis method .H peroxybenzoic acid cyclohexene oxide Epoxy attachment to parent compound, 1,2-epoxy-cyclohexane Oxirane as parent,oxygen number 1 H、CH => trans-2-ethyl-3-methyloxirane CH3CH2 Chapter 14 11
Chapter 14 11 Naming Epoxides • Epoxy attachment to parent compound, 1,2-epoxy-cyclohexane • Alkene oxide, from usual synthesis method peroxybenzoic acid O H H cyclohexene oxide • Oxirane as parent, oxygen number 1 trans-2-ethyl-3-methyloxirane O H H CH3 CH3CH2 =>
Spectroscopy of Ethers IR:Compound contains oxygen,but O-H and C=O stretches are absent. MS:a-cleavage to form oxonium ion,or loss of either alkyl group. ·NMR:13C-O signal betweenδ65-δ90， 1H-C-O signal betweenδ3.5-δ4. 二> Chapter 14 12
Chapter 14 12 Spectroscopy of Ethers • IR: Compound contains oxygen, but O-H and C=O stretches are absent. • MS: -cleavage to form oxonium ion, or loss of either alkyl group. • NMR: 13C-O signal between 65 - 90, 1H-C-O signal between 3.5 - 4. =>