J. Diaw chemical structure on number the spectrum peaks in a J. chronological fa

Question

J. Diaw chemical structure on number the spectrum peaks in a J. chronological fashion, and n the peak number to each carbon on the structure. All work must be clearly shown on the spectra worksheets and turned in for grading. Please also answer the following lab questions: Post-Lab estion H2BC. CH3 HC HC Acetone 2-Butanone 1) At what chemical shift range would the peaks corresponding to HA appear in the 'H-NMR spectrum of acetone? (a) 1.5-2.5 ppm (c) 0.5-1.5 ppm (b) 6.5-7.5 ppm (d) 9.0-11.0 ppm 2) According to the classical splitting of the (n+1)rule, Ha would appear as the following pattern of peaks in the IH-NMR spectrum of 2-Butanone: (c) a triplet (t) (e) none of the above (a) a singlet (s) d) quartet (q) (b) a doublet (d)

Explanation / Answer

NMR

1. Range for Ha

(a) 1.5-2.5 ppm

2. Hb appears as,

(c) triplet

3. Hc appears as,

(d) quartet

4. Hd appears as,

(a) a singlet

5. Number of signal for 2-butanone in 13C,

(d) 4

6. Number of signal for acetone in 13C,

(b) 2

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