Structure of 4-Substituted 3,4′-Diquinolinyl Sulfides Studied by ¹H and ¹³C NMR and X-Ray Analysis

Abstract

NMR and X-ray data show that 4-substituted 3,4′-diquinolinyl sulfides exist both in a solution and in solid state in a skew conformation at the main sulfide bridge and that non-typical position of H-2 proton may be attributed to its shielding by aromatic rings of a second quinoline fragment.