resonant excited state. An excellent agreement between theoretical and experimental vibrational frequencies as well as resonance Raman intensities could be achieved. It is concluded that through-σ-bond interaction between the formal lone pair on one amino nitrogen and the odd electron on the other is strong enough to lead to a symmetric charge-delocalized molecular structure of the DMP radical cation, with
已使用时间分辨光吸收和共振拉曼光谱研究了 N,N-二甲基
哌嗪 (
DMP) 的自由基阳离子。使用不同的量子
化学方法计算自由基阳离子基态和共振激发态的分子结构和振动力场。可以实现理论和实验振动频率以及共振拉曼强度之间的极好一致性。得出的结论是,一个
氨基氮上的形式孤对与另一个上的奇数电子之间的通过 σ 键相互作用足以导致
DMP 自由基阳离子的对称电荷离域分子结构,具有椅子型几何学。