1H NMR and Thermal Studies of CH3NH3Br in a Metastable Solid Phase Newly Found above 483 K-Reference-Cited by-同舟云学术

1H NMR and Thermal Studies of CH3NH3Br in a Metastable Solid Phase Newly Found above 483 K

Published:1989-08-01 Issue:8 Volume:44 Page:738-740
ISSN:1865-7109
Container-title:Zeitschrift für Naturforschung A
language:en
Short-container-title:

Author:

Tansho Masataka¹,Nakamura Daiyu¹,Ikeda Ryuichi²

Affiliation:

1. Department of Chemistry. Faculty of Science, Nagoya University, Nagoya 464-01. Japan

2. Institute for Molecular Science, Myodaiji, Okazaki 444, Japan

Abstract

Abstract By differential thermal analysis a new high-temperature solid phase of methylammonium bromide was found between 483 K and its “melting point” (510 K). 1H NMR absorption measurements revealed the presence of rapid 3D translational self-diffusion and overall rotation of methylammonium cations in this phase. These cationic motions are quite analogous to those of methylammonium iodide in its ionic plastic phase. Surprisingly, this plastic-like phase is metastable, the stable phase in the same temperature range being liquid.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

Link

https://www.degruyter.com/document/doi/10.1515/zna-1989-0810/pdf

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