What type of NMR spectrum is the following?
A)broadband decoupled
B)DEPT-90
C)DEPT-135
D)It is not possible to judge given just the spectrum.

Question

What type of NMR spectrum is the following? 
A)broadband decoupled 
B)DEPT-90 
C)DEPT-135 
D)It is not possible to judge given just the spectrum.

Quizplus · Accepted Answer

The presence of two distinct peaks for every carbon signal (one positive and one negative) indicates that it is a DEPT-135 spectrum. The other options can be excluded as the spectrum does not show a broad signal at around 50-60 ppm for broadband decoupling or a distinct peak for the CH3 carbon signal at around 90 ppm for DEPT-90.

What Type of NMR Spectrum Is the Following