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本工作在乙腈溶液中合成了十一种迄今未见报导的苯并—15—冠—5(Ⅰ)、4—硝基—苯并—15—冠—5(Ⅱ)、4—溴代苯并—15—冠—5(Ⅲ)及4—乙酰基—苯并—15—冠—5(Ⅳ)与希土硝酸盐的固体络合物。对它们进行了元素分析、差热分析、核磁共振谱、红外吸收光谱及电导测定。初步确定了这些络合物的组成。比较了它们的热稳定性:La(NO_3)_3·Ⅰ>La(NO_3)_3·Ⅱ,La(NO_3)_3·Ⅲ>La)NO_3)_3·Ⅳ,Y(NO_3)_3·Ⅰ>Y(NO_3)_3·Ⅱ。乙腈溶液中的电导数据证明它们均属非电离型。红外吸收光谱等结果没有表明-NO_2、CH_3CN等有参与配位的迹象,而NO_3~-则以双齿配位。
In this work, eleven kinds of benzo-15-crown-5 (Ⅰ), 4-nitro-benzo-15-crown-5 -15-crown-5 (Ⅲ) and 4-acetyl-benzo-15-crown-5 (Ⅳ) with a rare earth nitrate. They were subjected to elemental analysis, differential thermal analysis, nuclear magnetic resonance spectroscopy, infrared absorption spectroscopy and conductivity measurement. The composition of these complexes was initially determined. The thermal stability of La (NO_3) _3 · I> La (NO_3) _3 · Ⅱ, La (NO_3) _3 · Ⅲ> La) NO_3) _3 · IV and Y (NO_3) _3 · I> Y NO_3) _3 · Ⅱ. Conductivity data in acetonitrile prove that they are all non-ionized. Infrared absorption spectroscopy and other results did not show that -NO_2, CH_3CN and other signs of participation in the coordination, and NO_3 ~ - bidentate coordination.