Question

3. What is the value of coupling constant for trans olephinic protons in PMR?
(a) 2 HZ
(b) 4Hz
(c) 8 HZ
(d).16 Hz​

Answer 1

Explanation:

The first thing to do is convert the peaks from ppm into hertz. Suppose we have one peak at 4.260 ppm and another at 4.247 ppm. To get Hz, just multiply these values by the field strength in mHz. If we used a 500 mHz NMR machine, our peaks are at 2130 Hz and 2123.5 respectively.28-Oct-2016