Solid state phase transitions and molecular reorientation in o r t h o- and p a r a-carborane: An isomer effect
- 15 April 1980
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 72 (8) , 4600-4607
- https://doi.org/10.1063/1.439702
Abstract
The proton nuclear spin–lattice relaxation times at 30 MHz have been measured for ortho‐ and para‐carborane between 170 and 310 K and between 210 and 320 K, respectively. Para‐carborane undergoes solid–solid transitions at about 300 and 238 K while the ortho isomer shows only one transition at about 265 K. The details of the phase transitions are discussed and molecular reorientation in the isomers is compared.Keywords
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