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本实验确证了铝醚络合物AlCl_3·Et_2O在醚中~(27)Al的化学位移为100.9ppm,半峰宽为125Hz,而不是文献值50ppm,160Hz~[2,4]。证实了三氯化铝在乙醚中不是以二聚体Al_2Cl_6形式存在,而是以AlCl_3·Et_2O形式存在。铝醚络合物在己烷中~(27)Al的化学位移为102.5ppm,半峰宽251Hz。次甲基氢的~(1)H化学位移为4.20ppm。实验表明铝醚络合物与自由醚间存在快速交换过程。
This experiment confirms that AlCl 3 · Et 2 O AlCl 3 · Et 2 O has a chemical shift of 100.9 ppm and a full width at half maximum of 125 Hz in ether rather than the literature values of 50 ppm and 160 Hz [2,4]. It was confirmed that aluminum trichloride was not present in the form of dimer Al 2 Cl 6 but in the form of AlCl 3 · Et 2 O. The chemical shift of aluminum complex of Al 2 O 3 in Al 2 O 3 was 102.5ppm and half peak width was 251Hz. The ~ (1) H chemical shift of methine hydrogen was 4.20 ppm. Experiments show that there is a rapid exchange between aluminum ether complex and free ether.