If the proton attached to C2 in 1,1,2-tribromopropane is coupled with the protons on C1 (J = 3.5 Hz) and C3 (J = 6.8), draw the tree diagram of the C2 proton and predict the splitting pattern.
Question 2
How many positive and negative peaks appear in the DEPT-135 and in the DEPT-90 spectrum of 2-methylpentane?
a.
DEPT-135: two positive and one negative, DEPT-90: one positive
b.
DEPT-135: three positive and two negative, DEPT-90: one positive
c.
DEPT-135: three positive and two negative, DEPT-90: no signals
d.
DEPT-135: two positive and three negative, DEPT-90: two positive