13 C NMR chemical shift assignments for some carbazole derivatives

13 C 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.