Polymorphism of 1,2,3-Trichloropropane: NQR and DTA study of the ordered and desordered phases

N. VEGLIO; M. J. ZURIAGA; G. A. MONTI

JOURNAL OF PHYSICS CONDENSED MATTER

Año: 2004 vol. 16 p. 7873 - 7873

0953-8984

p class="MsoList" style="MARGIN: 0in 0in 4pt; TEXT-INDENT: 0in; LINE-HEIGHT: 150%; TEXT-ALIGN: justify">1,2,3-Trichloropropane was investigated by means of  Nuclear Quadrupole Resonance, and Differential Thermal Analysis. One amorphous state and two crystalline monotropic phases (form I and II) were found depending on the thermal history of the sample and only one is stable up to the melting point. The different phases were characterized by 35Cl NQR. It was conclude that form I is an ordered crystal with only one molecular conformation present in the unit cell while form II is a disordered state with at least two molecules present in the unit cell.