Structural Stability and Vibrational Analyses of Haloselenonyl Azides, XSeO2-NNN, where X is F, Cl, Br

International Journal of Molecular Sciences

Wolfgang Förner¹  Hassan M. Badawi² 

[1] id="af1-ijms-06-00230">Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arab

关键词: MP2 and DFT calculations;    structural stability;    vibrational modes and assign- ments;    haloselenonyl azides;   

DOI  :  10.3390/i6090230

来源: mdpi

【 摘 要 】

The structural stability of haloselenonyl azides was investigated by quantum mechanical Møller-Plesset perturbation theory of second order and density functional theory calculations. The 6-311+G** basis set was used to include polarization and diffuse functions in the calculations at the DFT-B3LYP level. The potential scans for the rotation of the -NNN rotor were calculated and found to be consistent with a single minimum that corresponds to a gauche conformation (-NNN moiety nearly eclipses one of the two selenonyl Se=O bonds) for the three halogens at ambient temperature. The structural parameters for the minima calculated by MP2 and DFT turned out to be very similar. The vibrational modes, infrared and Raman intensities as well as depolarization ratios were calculated at DFT-B3LYP/6-311+G** level for the three molecules in their gauche conformations. The potential energy distributions among symmetry coordinates of the normal modes of the molecules in their gauche conformation were then computed from normal coordinate analyses.

【 授权许可】

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