Directly-linked intramolecular donor-acceptor compounds of ferrocene and tetracyanoanthraquinodimethane

摘要

Two new intramolecular donor-acceptor species have been prepared linking ferrocene (Fc) directly to either the 1 (1) or 2 (2) positions of tetracyanoanthraquinodimethane (TCNAQ).Spectroscopic and electrochemical characterisation show significant differences between 1 and 2,revealing the importance of the position of attachment.The Fc part is a poorer donor and the TCNAQ part a poorer acceptor than the respective parent molecules and an intramolecular charge-transfer transition is observed at 604 nm (1) and 634 nm (2).The X-ray structure of 1 shows the TCNAQ component with the typical folded conformation with the ferrocene unit rotated by 38.0~° relative to the ring to which it is attached.