27 Al NMR spectroscopy of triethylaluminium. A direct method to the determination of the proportion of monomer in solution

Z Černý, S Heřmánek, J Fusek, O Kříž…

文献索引：Cerny, Z.; Hermanek, S.; Fusek, J.; Kriz, O.; Casensky, B. Journal of Organometallic Chemistry, 1988 , vol. 345, p. 1 - 10

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被引用次数: 11

摘要

Abstract The sole 27 Al NMR signal of triethylaluminum (TEA) is shifted significantly to lower field with:(1) decreasing concentration;(2) increasing temperature; and (3) increasing polarity of the solvent; that is, in each case with an increase in the amount of the monomeric form. 27 Al NMR chemical shifts of Al 2 Et 6 and AlEt 3 are estimated as 153±2 and 265±10 ppm, respectively. By use of these and observed values, thermodynamic data K d, ΔH d ...