Structures and energies of the radicals and anions generated from chlorpyrifos.
The radicals and anions generated from chlorpyrifos by removing a hydrogen atom have been investigated using the hybrid density functional B3PW91 method. The results show that all the radicals have been classified as three groups and their stability order is methylene (radical 1, 3, 5, and 7) > methyl (radical 9, 11 and 13) > ring (15); the anions have the relative energetic order: methyl > methylene > ring. Moreover, some decomposition reactions are also reported. The large HOMO-LUMO gaps indicate that both radicals and anions are predicted to be high-kinetic stable molecules. We also find that radicals 9, 11 and 13 have the highest AEAs and anions 2, 4 and 6 have higher VDEs. Additionally, natural population analysis charges show that there is the lowest Deltaq (0.14) for the C7 and C9 atoms. We hope that our theoretical results may provide a reference for further experiment and practical application.
Zhang
Yi
Y
Department of Animal Science, Southwest University, Rongchang, Chongqing, People's Republic of China.
Liu
Chang-Zhong
CZ
Li
Xiao-Jun
XJ
Wang
Zi-Liang
ZL
Zhang
Hai-Tang
HT
Miao
Zhi-Guo
ZG
D000838:Anions / Q000737:chemistry*; D004390:Chlorpyrifos / Q000737:chemistry*; D004583:Electrons; D005609:Free Radicals / Q000737:chemistry*; D008958:Models, Molecular; D013816:Thermodynamics
D000838:Anions; D005609:Free Radicals; D004390:Chlorpyrifos