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自从1967年Pedrsen开拓冠醚化合物研究以来,冠醚化合物与金属离子的配位作用的研究已相当广泛。冠醚化合物的催化、分离性质日益重要,深刻地研究冠醚化合物的本质很有必要。本文研究了取代苯并冠醚的磁圆二色性,而这一方面的研究还未见报道。1 实验结果化合物的磁圆二色谱在磁场强度0.7T下用JASCO-J20C型自动记录旋光仪测定,标度2/1000池长0.5cm,浓度为5×10~(-4)mol/L,实验结果及取代基的Hammett参数列于表1。MCD谱见图1,[θ]_M值为1T下的摩尔椭圆度(°·cm~2·dmol~(-1))。化合物4-取代苯并十五
Since 1953 Pedrsen pioneered the study of crown ether compounds, the study of the coordination between crown ether compounds and metal ions has been quite extensive. Crown ether compounds catalytic nature of the separation is increasingly important, a thorough study of the nature of crown ether compounds is necessary. In this paper, we studied the circular dichroism of substituted benzo crown ethers. However, the research on this aspect has not been reported yet. 1 Experimental Results The magnetic circular dichroism spectrum of the compound was measured with a JASCO-J20C automatic recording polarimeter at a magnetic field strength of 0.7T. The scale 2/1000 cell length was 0.5 cm with a concentration of 5 × 10 -4 mol / L, The Hammett parameters of the experimental results and the substituents are shown in Table 1. The MCD spectrum is shown in Fig. 1 and the [θ] M value is the molar ovality at 1T (° · cm 2 · d · mol -1). Compound 4-Substituted Benzo-XV