Oligothiophenes III: Synthesis of Tetra‐thienyl‐Substituted Ethylenes Including an Abnormal McMurry Coupling Result
摘要:
This article describes the synthesis of some selected tetra-thiophenyl-substituted ethenes by McMurry coupling of some selected thienyl ketones, including a surprising coupling product. The products were analyzed by MS, NMR, UV, and x-ray crystallography. Their cyclic voltagrams were recorded.
Photochromic naphtho [2,1-b]pyran compounds containing bithienyl or terthienyl substituents, process for their manufacture, and photochromic materials and articles obtained
Poly(cyclopropenone)s: Formal Inclusion of the Smallest Hückel Aromatic into π-Conjugated Polymers
作者:Patricia A. Peart、John D. Tovar
DOI:10.1021/jo101108f
日期:2010.8.20
hydrolyzed to the respective cyclopropenones. The unusually strong dipole moment associated with the cyclopropenone renders this core formally aromatic, an electronicstructure that becomes more important within individual monomers upon protonation of the carbonyl function with trifluoroacetic acid or alkylation with triethyloxonium salts. The electronic properties of cyclopropenone polymers in their pristine