Synthesis and electrochemical properdties of pi-extended n-arylpyrrolo[3,4-d]tetrathia-fulvelenes

摘要

A series of pi-extended N-arylpyrrolo[3,4-d]tetrathiafulvalenes,N-aryl-2-[4,5-bis(ethylthio)-l,3-dithiole-2-ylidene]-(l,3)-dithiolo[4,5-c]pyrrole (3a-d) were prepared via cross-coupling of 4,5-bis(ethylthio)-l,3-dithiol-2-one (12) with N-aryl-(l,3)-dithiolo[4,5-c]pyrrole-2-thiones (lla-d).The latters were obtained by the reactions of 4,5-bis(bromomethyl)-l,3-dithiole-2-thione (8) with aromatic amines (9a-d).Electrochemical behavior of compounds (3a-d) was studied by means of cyclic voltammetry.It was found that all these compounds (3a-d) have comparable to or lower half-wave potentials than those of N-alkyl-pyrrolo[3,4-d]tetrathiafulvalenes (2a-c).