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Phase Transition in C4H12NI·I2
H. Ishigami,M. Shiro,M. Sumita,S. Sato,T. Hori,Y. Tsunashima 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
The title compound C4H12NII2 was prepared addition of iodine to a tetramethylammonium iodide. The crystal showed anomalies at 218 K, 238 K and 308 K on dierential scanning calorimetry (DSC) measurement, whereas the crystal of tetramethylammonium iodide showed no anomaly. Crystal was grown by slow evaporation from an ethanol solution at 298 K. The crystal structure of orthorhombic C4H12NII2 of room temperature determined by use of a Imaging Plate diractometer is space group Pnnm, a = 14.115(1) A, b = 10.0997(7) A, c = 8.3019(5) A, V = 1183.5(3) A3, Z = 4. The present work reports the details of the crystal structure and phase transition of C4H12NII2.