Structural and Thermodynamic Insight into Solid State Phase Transition Mechanism of a 1,3,3′-Triketone
作者:Vladimir Stilinović、Branko Kaitner
DOI:10.1021/cg400016z
日期:2013.4.3
A study of a solid state phase transition in dipivaloyl(3-cyclopentylpropanoyl)methane was undertaken by a combination of crystallographic and calorimetric methods. The high temperature polymorph with two molecules in the asymmetric unit and a disordered cyclopentyl group undergoes a reversible phase transition into an ordered structure with a single molecule in the asymmetric unit. The transition
结合晶体学和量热法研究了二戊酰基(3-环戊基丙酰基)甲烷中的固态相变。具有在不对称单元中的两个分子和无序的环戊基的高温多晶型物经历可逆相转变为在不对称单元中具有单个分子的有序结构。转变温度为-20.80°C,最小磁滞为1°C。新相的成核之后是差示扫描量热法,并且发生在大约从大约1℃开始的宽温度范围内。在转变温度之上和之下0.5°C,新生相晶体的晶体学取向与母体晶体的晶体取向高度一致。