ufteach.blogg.se

The signal for the red proton into a doublet, so two peaks for the signal for the red proton. The magnetic moment can be aligned either with the external magnetic field, or against it, and that splits Signal for the blue proton to be split into two, so if I go down here, so we actually see a doublet for the signal for the blue proton. Proton's magnetic moment can align either with theĮxternal magnetic field, or against the external magnetic field, and that causes the So here's the spectrum with no coupling, but we know that the red Signal for the blue proton, and one signal for the red proton. So let's think about first, the NMR spectrum with no coupling, so we would expect one On the same carbon, we call this geminal coupling, so geminal coupling here, so geminal, referring to the fact that both protons are on the same carbon, and coupling can occur, so those protons are close enough where they can affect each other. At the red and blue protons, they're both attached to this carbon, and if we see this double bond here, we have these different groupsĪttached to this double bond, and since there's no rotationĪround the double bond, the red and the blue protons are locked into different environments, therefore, they are NOTĬhemically equivalent, and since those protonsĪre not equivalent, they can couple together, and since this is occurring