Aggregation of methylpyrazinium iodide and its derivatives in chloroform and dichloromethane solutions was studied by EAS and 1H NMR spectroscopy. The isopentylpyrazinium iodide ion quadruple formation constants in solutions were evaluated. Formal extinction coefficient in the outer-sphere charge transfer band maxima does not depend on the degree of aggregation in the system. A model suggested for the formation of ion quadruples in solutions was discussed in terms of the density functional theory and using the X-ray diffraction data for crystalline methylpyrazinium iodides and its derivatives.
利用 EAS 和 1H NMR 光谱研究了甲基
吡嗪碘及其衍
生物在
氯仿和
二氯甲烷溶液中的聚集情况。评估了溶液中异戊基
吡嗪碘离子的四元形成常数。外层电荷转移带最大值的形式消光系数与体系中的聚集程度无关。根据密度泛函理论,并利用晶体甲基
吡嗪碘化物及其衍
生物的 X 射线衍射数据,讨论了溶液中离子四元组形成的模型。