Bibinou 10 Posted January 24, 2007 Hello, Why do we habe 3 peaks for CDCl3 in NMR 13C? Does it come from deuterium or chlorine? 0 Share this post Link to post Share on other sites
AL 11 Posted January 24, 2007 It comes from splitting from deuterium. The formula for splitting is 2nI + 1, where n is the number of nuclei, and I is the spin type. Since CDCl3 has 1 deuterium (n = 1), and the spin type is 1 (I = 1), you get 2(1)(1) + 1 = 3, so 3 peaks. Ordinary hydrogen has spin type 1/2, which is why there is a different splitting rule for that (n + 1 rule). 0 Share this post Link to post Share on other sites
