H-transfer motions in an H-bonded (chloranilic acid)-(1,3-diazine) 1: 2 molecular complex studied by 35Cl NQR and 1H NMR

Ryuichi Ikeda, Satoshi Takahashi, Taka Aki Nihei, Hideta Ishihara, Hiroyuki Ishida

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Abstract

35Cl NQR and 1H NMR relaxation times (T1Q, T1H) were measured in a hydrogen-bonded (chloranilic acid)-(1,3-diazine) 1:2 molecular complex in a temperature range of ca. 100-300 K. NQR frequencies observed were explained by the monovalent (1-) ionic structure of chloranilic acid, implying partial H-transfer to diazine molecules. This H-transfer was shown to be dynamic by observing a single T1H minimum at ca. 120 K. Two new relaxation processes observed by NQR in high-temperature range, but undetected by NMR, were shown to be H-transfer motions between differently charged states of chloranilic acid molecules.

Original languageEnglish
Pages (from-to)1241-1245
Number of pages5
JournalBulletin of the Chemical Society of Japan
Volume78
Issue number7
DOIs
Publication statusPublished - Jul 15 2005

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ASJC Scopus subject areas

  • Chemistry(all)

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