题目

英语翻译
In the case of the p-nitroaniline anion,the transition between the HOMO and the LUMO corresponds to the 9b2-5b1 transition and is therefore symmetry-forbidden.The observed long-wave absorption band of the pnitroaniline anion probably corresponds to the 4b i-5b 1 transition with the same redistribution of electron density
as in the case of p-nitroaniline.Similarly,it follows from the calculations that for p-nitroaniline protonated in the ring,the long-wave band is due to the transition 17a'--18a",for the forms of nitroaniline protonated at the nitro-group and with transfer of a proton from the amino-group to the nitro-group it corresponds to the transition 6 a ' - - 7 a ' ,and for the nitroanilinium ion it corresponds to the transition 10a'~16a".The energies of these transitions are given in Table 1.It can be seen that the attachment of a proton to the nitro-group or the removal of a proton from the amino-group leads to a long-wave displacement of the long-wave band of p-nitroaniline.The band of p-nitroaniline is displaced in the same direction when a proton is transferred from the amino-group to the nitro-group.The attachment of a proton to the amino-group or to the center of the benzene ring produces a short-wave displacement of the long-wave band.

提问时间：2020-10-26

答案

在这个例子中负离子,紫外吸收光谱数据之间的过渡和LUMO智人9b2-5b1相适应的,因此是symmetry-forbidden过渡.观察到的pnitroaniline乐队具有吸收负离子大概相当于4b i-5b 1过渡具有相同的再分配的电子密度
作为在案件的紫外吸收光谱数据.同样,它遵循从紫外吸收光谱数据中计算方法,为在环,同时具有乐队是由于过渡17a '——18a”,为形式的nitroaniline在nitro-group中一个质子和转移,从amino-group过渡时期的nitro-group所对应的是6个' - - 7 ',为nitroanilinium离子所对应的是过渡10a的~本人”.这些转变的能量由表1给出.可以看出,连接到nitro-group一个质子或去除一个质子从amino-group通向一个具有位移的同时具有群紫外吸收光谱数据.紫外吸收光谱数据迁移的乐队在同一个方向时的一个质子转移到nitro-group amino-group.一个质子的附件的amino-group或中心的苯环产生短波位移的同时具有乐队.