Square-Planar trans-Bis-(1-p-n-octylphenylbutane-1,3-dionato) copper (II), a New Compound Exhibiting Three Kinds of ‘Double Melting’ Behaviour
Square-Planar trans-Bis-(1-p-n-octylphenylbutane-1,3-dionato) copper (II), a New Compound Exhibiting Three Kinds of ‘Double Melting’ Behaviour
复制标题
方形平面反式双(1-对正辛基苯基丁烷-1,3-二酮)铜(II)，一种具有三种“双熔化”行为的新化合物
DOI：
10.1080/00268948108072693
复制
发表时间：
1981
影响因子：
0.7
通讯作者：
H. Mikawa
中科院分区：
文献类型：
--
作者：
K. Ohta;M. Yokoyama;S. Kusabayashi;H. Mikawa
摘要 新化合物双-(1-对-正辛基苯基丁烷-1,3-二酮)铜(II)具有四种多晶型物C1（熔点96°C），均具有相同的方形平面反式结构。 C1、Ca 和 Cm 表现出“双熔化”行为，即仅在非常快速加热时才观察到它们熔化，而 Ca 和 Cm 仅在缓慢加热时才观察到熔化。在约 50°C 时观察到从 C1 到 Ch 的缓慢固-固相转变。每种多晶型物都可以在室温下以稳定形式获得，并给出完全不同的X射线衍射粉末图案。四种形式的相互关系已通过差示扫描量热和显微测量得到阐明。当配合物的熔体快速冷却时，它转变为玻璃态，在室温下稳定。玻璃化转变温度T8和结晶温度Te非常接近，分别为52.5℃和58.0℃。
Abstract The new compound, bis-(1-p-n-octylphenylbutane-1,3-dionato) copper(II) has four polymorphs, C1 (m.p. 96°C), all having the same squareplanar trans structure. C1, Ca, and Cm exhibit ‘double melting’ behaviour, i.e., they melt at their was observed only on very rapid heating, while that of Ca and Cm only on slow heating. Slow solid-solid phase transition from C1 to Ch was observed at ca 50°C. Each polymorph could be obtained as a stable form at room temperature and gave a quite different X-ray diffraction powder pattern. The interrelationships of the four forms have been clarified by differential scanning calorimetric and micriscopic measurements. When the melt of the complex is rapidly cooled, it converts into a glassy state, which is stable at room temperature. The glass transition temperature T8 and the crystallizing temperature Te are very close to each other at 52.5°C and 58.0°C, respectively.