1,4-苯并二氮杂-2-酮的电荷转移性质

本文用分光光度法测定了标题化合物分别与TCNE和对甲苯酚钾形成的电荷转移络合物的电子跃迁能hvcr并计算了它们的电子亲合力(E_A)和电离势(I_p),还测定了络合物的热力学常数(K,ΔH,ΔS)。结果表明,该化合物不但可以作为电荷受体,也可以作为电荷给体。处于分子7位取代基的Hammett常数σ与hv_cr(或ΔH)有线性关系。

The Characteristics of Charge Transfer of 1,4-Benzodiazepin-2-ones

The interaction of 1,4-benzodiazepin-2-ones, the sedatives and muscle relaxants in medicine, with tetracyanoethylene or potassium p-methylphenoxide can form charge transfer complexes respectively. Using spectrophotometric method, the electron affinity(E_A) and the ionizaton potential (I_p) of the title compounds are calculated with the energy of electron transfer hv_CT. The thermodynam-ic constants(K, △H, △S) of the complexes are determined as well. The results show that 1,4-benzo-diazepin-2-ones can not only act as the charge acceptors but also as the charge donors. The hv_CT or △Hvs Hammett substituent constant σ at position 7 of the molecule gives a linear relationship.