Studies of some hindered 2, 2′-bithienyls and 3, 3′-bridged 2, 2′-bithienyls with special reference to their uv spectra and oxidation potentials

Abstract

Some hindered bithienyl derivatives have been synthesized by cross-coupling reaction of Grignard reagents using NiCl2(dppp)(dppp = Ph2PCH2CH2CH2PPh2) or by reductive dimerization in the presence of Zn/NiCl2(PPh3)2. Their UV spectra and oxidation potentials are discussed in terms of their coplanarity and of the inductive effect of the substituent. © 1989, Taylor & Francis Group, LLC. All rights reserved.