Structure of liquid formamide studied by means of X-ray diffraction and NMR at high temperatures and high pressures

Hitoshi Ohtaki, Naoki Katayama, Kazuhiko Ozutsumi, T. Radnái

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The structure of liquid formamide has been investigated by means of X-ray diffraction and NMR at high temperatures and high pressures (HTHP). The temperatures were fixed at 298 K and 373 K, and the pressures employed were 0.1, 20, and 40 MPa for the X-ray diffraction studies, while the NMR measurements were carried out over the temperature range from 300 K to 395 K at 0.1 MPa and over the pressure range from 0.1 to 200 MPa at 298 K. Formamide has a network structure consisting of a mixed ring and head-and-tail-type linear structures through N-H···O hydrogen bonds at 298 K and 0.1 MPa, and the ring structure, which has weaker hydrogen bonds than the linear structure, is broken with increasing temperature to change to the linear-type structure. On the other hand, the linear structure changes to the ring structure, having a more compact molecular arrangement than the linear one, with the increase in pressure.

Original languageEnglish
Pages (from-to)109-120
Number of pages12
JournalJournal of Molecular Liquids
Volume88
Issue number2-3
DOIs
Publication statusPublished - Nov 2000

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Nuclear magnetic resonance
X ray diffraction
nuclear magnetic resonance
ring structures
Liquids
liquids
diffraction
Hydrogen bonds
x rays
hydrogen bonds
Temperature
temperature
formamide
rings

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Structure of liquid formamide studied by means of X-ray diffraction and NMR at high temperatures and high pressures. / Ohtaki, Hitoshi; Katayama, Naoki; Ozutsumi, Kazuhiko; Radnái, T.

In: Journal of Molecular Liquids, Vol. 88, No. 2-3, 11.2000, p. 109-120.

Research output: Contribution to journalArticle

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