Hydrogen transfer in hydrogen-bonded chloranilic acid studied by 35Cl NQR I - A 1:2 complex with 1,4-diazine

Taka Aki Nihei, Shin'Ichi Ishimaru, Hiroyuki Ishida, Hideta Ishihara, Ryuichi Ikeda

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28 Citations (Scopus)


35Cl NQR frequencies and spin-lattice relaxation time (T1Q) and 1H NMR relaxation times (T1H) in a H-bonded three molecular system, chloranilic acid-1,4-diazine (1:2) were measured to reveal H-motions in a symmetric two H-bonds in solid. A single 35Cl NQR frequency observed implies that the time-averaged structure of chloranilic acid is roughly monovalent in accordance with pKa values in both acid and base. T1H temperature dependence was explained by a single relaxation mechanism due to the correlated H-transfer in two H-bonds, while that of T1Q yielded two relaxation processes. One of these undetected by 1H NMR was explained by the uncorrelated H-transfer.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalChemical Physics Letters
Issue number1-2
Publication statusPublished - Oct 13 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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