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Proton and Carbon-13 Nuclear Magnetic Resonance Studies of Conformations of 1,3-Dipyridylthioureas

Authors
Publisher
Royal Society of Chemistry
Publication Date
Keywords
  • Inorganic & Physical Chemistry
Disciplines
  • Chemistry

Abstract

Studies of $^1H$ and $^{13}C$ chemical shifts and of $^1H-^lH$, $^{l3}C-^1H$ coupling constants of 1,3-di-(2-pyridyl)- thiourea and its substituted derivatives indicate the occurrenceof topomerisation between two internally hydrogen-bonded conformers, with a Z,E \rightleftharpoons E,Z interconversion barrier of ca. $55.0 kJ mol^{-l}$.

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