![]() ![]() The larger coupling constant can be most easily found by finding the frequency difference between the two center lines of the triplets. How do you find the triplet coupling constant? Click ‘grid’ and then uncheck all of the boxes. On the ‘Scales’ tab, unclick vertical on the axes section. ![]() Right click on the spectra and click ‘Properties’. Remove all the grid lines and vertical scales from the spectra. The coupling constant is independent of the field strength, and has a plus or minus prefix and it is mutual to the coupled atoms (nJA,X=nJX,A). The coupling constant is defined as nJA,X, where n is the number of chemical bonds between the two coupling atoms A and X. Drag a box around each group of equivalent protons. To do this, go to Analysis → Multiplet Analysis → Manual (or just hit the “J” key). The easiest one is to use the Multiplet Analysis tool. To calculate coupling constants in MestreNova, there are several options. The coupling constant, J (usually in frequency units, Hz) is a measure of the interaction between a pair of protons. ![]()
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