Benincori, Tiziana; Brenna, Elisabetta; Sannicolo, Franco; Zotti, Gianni; Zecchin, Sandro; Schiavon, Gilberto; Gatti, Carlo; Frigerio, Giovanni published the article 《Steric and Electronic Effects in Methyl-Substituted 2,2′-Bipyrroles and Poly(2,2′-Bipyrrole)s: Part I. Synthesis and Characterization of Monomers and Polymers》. Keywords: electrochem polymerization bipyrrole; methyl substituent polypyrrole elec property.They researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Category: chiral-oxygen-ligands. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:616-43-3) here.
The effects of N- and C-Me substitution on the elec. and spectral properties of pyrrole, 2,2′-bipyrrole, and the corresponding polymers were investigated. A whole series of monomethyl and N- or Cβ-dimethyl-substituted 2,2′-bipyrroles was synthesized, and the electrochem. and spectral properties of all the compounds were investigated under identical testing conditions. The corresponding polymers were prepared by electrochem. anodic oxidation under comparable exptl. conditions and their spectroscopic and conductivity properties evaluated for comparison. The higher degree of efficiency in transmission of electronic effects associated with Me substitution at Cβ with respect to substitution at N was clearly demonstrated. The influence of the symmetry of the starting monomer (C2v or Cs) on the elec. properties of the resulting polymers is discussed.
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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate