1. Analysis of NMR spectral problems
Molecular formula and index of hydrogen deficiency
Number of signals
Integration
Pattern chemical shifts
Signal splitting pattern
Structural formula

2. Following is the 1H-NMR spectrum of compound S, molecular formula C7H12. Compound S reacts with bromine in carbon tetrachloride to give a compound with the molecular formula C7H12Br2. The 13C-NMR spectrum of compound S shows signals at  (a)150.12, (b)106.43, (c)35.44, (d)and (e) 28.36, Deduce the structural formula of S. 3 2 1

3. d

4. a.(t) δ 1.05
b. (m) δ 1.82
c. (d) δ 1.7
d. (m) δ 4.1

5. (B)
(A)
(A) = δ 0.9 (t,3H), δ 2.0 (s,3H), δ 4.1 (q,2H)
(B) = δ 0.9 (t, 3H), δ 2.0 (q,2H), δ 4.1 (s,3H)