13C NMR chemical shift assignments for some carbazole derivatives

Abstract 13C NMR chemical shift assignments have been made for a series of 1‐substituted carbazoles, 8‐substituted 1,2,3,4‐tetra‐hydrocarbazoles, 1‐substituted benzo[a]carbazoles and 6‐substituted dibenzo‐[c,g]carbazoles. Single examples were examined of other classes of substituted carbazoles: 3‐butylcarbazole and its tetrahydro precursor 6‐butyl‐1,2,3,4‐tetra‐hydrocarbazole, 8‐butyl‐ and 8,10‐diethylbenzo[a]carbazoles and their 5,6‐dihydro precursors, dibenzo[a,i]carbazole and its 5,6,7,8‐tetrahydro precursor, benzo[c]carbazole and its 6‐chloro derivatives and 5,6‐dihydrobenzo[c]carbazole and 5,6,8,9‐tetrahydrodibenzo[c,g]carbazole and their N‐methyl derivatives. In addition, the N‐(1‐pyrrolidinomethyl) derivatives of carbazole, 1,2,3,4‐tetrahydrocarbazole, benzo[c]carbazole and dibenzo[c,g] carbazole were also studied.