Question

Assign the hydrogen atoms Ha - Hd to the chemical shifts in the spectrum below. С,Н,S 300 MHz H NMR in CDCI3 Source: Aldrich Spectra Collection/Reich g нн s- a d 3.00 нн b 2.04 2.05 0.96 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 ppm На [Choose] 2.51 ppm 0.85 ppm 1.33 ppm НЬ 1.64 ppm Нс Choose Hd Choose] I-

Answer 1

1+ e Spliting patter u deeidas (2nI+) ule by S-Ha Hb (22x V241) = 3 25xa 2H) 4 Ha= (085 Ppn 3H, ple 64 PPm, 2) Aextet 1=251 ppm, 2, quartet (2»3M 2+H) H& 1-33 ppm 1A, Friplet(2x2x2+) -3