http://64188.org/story.php?title=oupling-the-two-lines-of-1-will-collapse-in-presence-of-decoupling Oupling"), the two lines of 1 will collapse. In presence of decoupling, one can no longer consider two distinct populations of 1 spins (the one next to 11 and the other next to 12): their fast interconversion between the two lead to an average resonance frequency for "a." Nowadays, these double-irradiation techniques are no longer used and the proof that two spins are scalar coupled can be obtaine Wed, 12 Apr 2023 02:11:41 UTC en