Two nitronyl nitroxide derivatives bearing imidazole and benzimidazole ring were prepared and their hydrogen-bonded structures and magnetic properties were characterized.

Going around in circles: The copper(I)‐mediated annulation of a doubly 1,3‐butadiyne‐bridged carbazole dimer with amines or Na2S provides isophlorins containing carbazole or thiophene‐carbazole moieties, respectively (see scheme). Oxidization of the thiophene‐containing isophlorin with MnO2 gives the corresponding porphyrin, which displays distinct aromaticity and remarkably intensified and red‐shifted absorption bands in the near IR region.

No abstract