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 12Chapter 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. =>