ab initio Molecular orbital study of disulphur dinitride, S2N2

Abstract
The structure and ionization spectrum of disulphur dinitride (S2N2) is discussed using the ab initio molecular orbital method, and the predicted square-planar geometry is in excellent agreement with the experimental geometry; a simple many-body perturbation technique suggests that the lowest ion state arises from removal of a π electron in disagreement with the Koop-mans' theorem prediction.

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