氮杂俘精酸酐作为光致变色材料近年来已引起人们的极大兴趣,但其晶体结构数据还未见报导.测定它们的晶体结构,研究其结构与性能的关系,有着非常重要的意义.本文测定了标题化合物(Ⅰ)和(Ⅱ)的结构。实验1.从氯仿和石油醚的混合溶剂中培养出黄色单晶.在Nicolet R 3m/E 四圆衍射仪上收集衍射强度数据.用石墨单色器单色化的Mo Kα射线作辐射光源,以θ/2θ扫描方式收集2θ3～50°范围的数据.强度数据没有进行吸收校正.有关晶体数据列于表1中。
With the introduction of Poisson's ratio in the expression of Young's modulus,nearly all the theoretical values of the various elastic moduli for the alkaline earth metals and rare earth elements can be greatly refined, with the single exception of the theoreticalvalue of Young's modulus for Pr which is slightly increased This points to the validityof the new theory, that the bulk modulus is independent of the Poisson's ratio, and further that the valency electron structures of solids as determined by Yu's theory are correct.
