Question

144 ChemActivity 16 Spectroscopy IfH's could sing, which would be louder... .wo H's singing a tune together or 3 H's singing a tune together? (Assume each H's sings at a similar volume.) d) What structural information is conveyed by peak cluster areas in a 'H NMR spectrum? e) 24. Explain the chemical shift (ppm values), and peak cluster areas (integration line) for the following proton NMR spectrum. Assign a letter to each peak cluster and match this to appropriate H/H's on the structure. (The peak at 0 ppm is a reference.) For now, don't worry about the number of peaks in each peak cluster 0- c ppm 25. The easy way to determine that two H's are chemically equivalent (NMR equivalent) is to either find that the H's in question are linked by an internal mirror plane. that rotation of single bonds allows you to switch the positions of H's in question. a) Find the mirror plane between the 2 equivalent CHy groups in CTQ 24. b) Explain why the 3 H's of a methyl group are NMR equivalent. hud lu see 26. Interestingly, you can prove that H's on different molecules are NMR equivalent by finding an external mirror plane that links them. This means that a molecule and its enantiomer will produce the exact same NMR spectrum. extemal mirror plane CHCHs CH2CH3 Hs Imagine you have two bottles: one with (R) the other with (S)-2-bromobutane. Unfortunately, your lab partner messed up and labeled both bottles simply "2- bromobutane". Can you use NMR to sort out this problem? Explain why or why not. BrB CH3
I need help with a.)

Answer 1