Chinese Journal of Applied Chemistry ›› 1993, Vol. 0 ›› Issue (2): 78-80.
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Liu Qitao, Zhang Xiangdong, Jiang Xiangshun, Xue Bangming, Jiang Hui
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Abstract: The heats of immersion of orthoboric acid in twelve organic bases and the adsorption heats of nine organic bases on γ-alumina were determined. The heat values were correlated with the corresponding enthalpies of boron trifluoride and antimony penta chloride, the well-known homogeneous prototype of Lewis acid. The results show that the heats of immersion of H3BO3 appear to be well correlated with the thermochemical measurements of BF3 and SbCl5 (correlation coefficient are 0.98 and 0.97 respectively), but the correlation coefficient for the adsorption heats of γ-Al2O3 and the two homogeneous prototype of Lewis acid are only 0.95 and 0.92 respectively. It is concluded that the reaction of orthoboric acid with the organic bases is an essential Lewis acid-base interaction and the orthoboric acid could be used as a solid prototype of Lewis acid.
Key words: boron trifluoride, antimony pentachloride, solid model of Lewis acidity, heat of immersion, adsorption heat
Liu Qitao, Zhang Xiangdong, Jiang Xiangshun, Xue Bangming, Jiang Hui. A THERMOCHEMICAL STUDY ON THE ESTABLISHMENT OF SOLID MODEL OF LEWIS ACIDITY[J]. Chinese Journal of Applied Chemistry, 1993, 0(2): 78-80.
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