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Unformatted text preview: 1 H NMR: two distinct protons in the 2.5-4.5ppm region – one next to the bromine, one next to the methoxy group. 4. IR: Loss of C=C @ ~1600cm-1 and C-H (sp 2 ) @ ~3050cm-1 ; all other significant differences would be located in the fingerprint region. 1 H NMR: Loss of vinyllic protons, loss of protons next to bromine, appearance of two new signals in 2.5-4.5ppm region from two sets of protons adjacent to oxygen 5. IR: Disappearance of C=C stretch, appearance of C=O stretch, disappearance of C-H (sp 2 ) 1 H NMR: loss of vinyllic protons, appearance of protons next to carbonyl group (1.5-2.5ppm) 6. IR: Loss of C=C, C-H(sp 2 ), appearance of alkyne signal 1 H NMR: loss of vinyllic protons, appearance of alkyne proton, protons of carbons two bonds away from oxygen will be deshielded slightly....
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- Spring '08
- Proton, Br Br Br, methoxy group, HBr Br LDA