1H NMR and Thermal Studies of CH3NH3Br in a Metastable Solid Phase Newly Found above 483 K
1989 ◽
Vol 44
(8)
◽
pp. 738-740
◽
Keyword(s):
H Nmr
◽
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.
1989 ◽
Vol 44
(11)
◽
pp. 1111-1115
◽
1997 ◽
Vol 52
(6-7)
◽
pp. 493-501
◽
1992 ◽
Vol 47
(11)
◽
pp. 1127-1134
◽
1981 ◽
Vol 14
(11)
◽
pp. 1332-1336
◽
Differential Thermal Analysis and Dielectric Studies on 2-Methyl-2-Nitro-Propane under High Pressure
1995 ◽
Vol 50
(4-5)
◽
pp. 502-504
◽
1989 ◽
Vol 44
(8)
◽
pp. 741-746
◽