Question

1-2H setter ppm 1.6 Ppm 0.90 ppm Courbe singlet sextet s neighboo 21 groups quintet group 4 neighbor 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 ppm 1.97 5.05 3.00

What compound gave off this spectrum? After classification tests, I confirmed unknown was a primary alcohol. originally thought that this spectrum aligned with 1-pentanol... not so sure now. Please help!

Answer 1

A: 0.89ppm: 3H, t: CH3-CH2 B: 1.3ppm: 5H, m: -CH2-CH2- and -OH as well. The -OH proton peak is mearged with this signal. Hence total 5H C: 1.55ppm: 2H, pentet: -CH2-CH2-CH2- D: 3.65ppm: 2H, t: -CH2-CH2-OH most down fielded hence carbon must be attached to -OH 7.2ppm peak is for solvent If we join all the fragments above we get 1-pentanol. В C OHB pentan-1-ol Нас В А This is a litrature spectrum of 1pentanol and it matches with your spectrum. Hence, we can confirm with the alcohol is 1-pentanol. 28 26 18