Molecular motion and phase transitions in solid hexafluorobenzene + benzene complex by nuclear magnetic resonance and heat capacity measurements

1978 ◽  
Vol 74 ◽  
pp. 1164 ◽  
Author(s):  
John A. Ripmeester ◽  
David A. Wright ◽  
Colin A. Fyfe ◽  
Robert K. Boyd
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Heat Capacity ◽  
Phase Transitions ◽  
Magnetic Resonance ◽  
Molecular Motion ◽  
Heat Capacity Measurements ◽  
Nuclear Magnetic

The thermodynamics of orientational disorder in a molecular solid: (CH3)3CCHO

1988 ◽  
Vol 66 (4) ◽  
pp. 729-733 ◽  
Author(s):  
Mary Anne White ◽  
Allyson Perrott
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Heat Capacity ◽  
Phase Transitions ◽  
Solid State ◽  
Magnetic Resonance ◽  
Thermodynamic Parameters ◽  
Solid Phase ◽  
Orientational Disorder ◽  
Molecular Solid ◽  
Nuclear Magnetic

The heat capacity of tert-butylaldehyde, (CH3)3CCHO, has been measured as a function of temperature from 29 to 298 K, to investigate solid-state polymorphism. There are two solid–solid phase transitions in this material, Ttr = 158.5 and 183.9 K, ΔStr = 0.402 R and 3.153 R respectively. The thermodynamic parameters for the transitions are consistent with mechanisms proposed on the basis of recent nuclear magnetic resonance investigations of this material.

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