Synthesis of 8-methyl[2.2]metacyclophanes and their charge-transfer complexes with tetracyanoethylene

Abstract

The regioselective 1:1 charge-transfer band of 13-substituted 8-methyl[2.2]metacyclophanes with tetracyanoethylene in CH2Cl2, attributable to the 8-methyl substituted benzene-site complex, are observed in the field of 556–605 nm, which is strongly affected by π-electron density of the opposite aromatic ring.