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Deprotonated cytosine anions: A theoretical prediction of photoelectron spectra

机译:去质子化的胞嘧啶阴离子:光电子光谱的理论预测

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Predictions on the photoelectron spectra of deprotonated cytosine anions (cytosinate, Cye(-)) have been made with ab initio electron propagator methods. Two imino-oxo forms are most stable, but four other isomers have energies within 10 kcal/mol. The first vertical electron detachment energies (VEDEs) for the three most stable Cye- isomers are approximately 3.4 eV. Imino-oxy VEDEs are about 0.3 eV smaller. For each anion, the lowest VEDE corresponds to a pi Dyson orbital. The order of higher final states is changed when relaxation and correlation effects are considered. Considerable mixing between lone-pair and bonding lobes occurs in the sigma Dyson orbitals.
机译:脱质子化的胞嘧啶阴离子(胞嘧啶,Cye(-))的光电子光谱的预测已使用从头算电子传播器方法进行了预测。两种亚氨基羰基形式最稳定,但其他四个异构体的能量在10 kcal / mol之内。三种最稳定的Cye-异构体的第一垂直电子离解能(VEDE)约为3.4 eV。氨基氧基VEDE约小0.3 eV。对于每个阴离子,最低的VEDE对应于pi Dyson轨道。当考虑松弛和相关效应时,最终状态的高阶会改变。孤对和结合波瓣之间发生了相当大的混合,发生在sigma Dyson轨道中。

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