A CAS study on S-loss and O-loss dissociation mechanisms of the SO(2) (+) ion in the C, D, and E states

Journal of Computational Chemistry
Qingyong Meng, Ming-Bao Huang

Abstract

In the present work, we mainly study dissociation of the C (2) B(1) , D(2) A(1) , and E(2) B(2) states of the SO(2) (+) ion using the complete active-space self-consistent field (CASSCF) and multiconfiguration second-order perturbation theory (CASPT2) methods. We first performed CASPT2 potential energy curve (PEC) calculations for S- and O-loss dissociation from the X, A, B, C, D, and E primarily ionization states and many quartet states. For studying S-loss predissociation of the C, D, and E states by the quartet states to the first, second, and third S-loss dissociation limits, the CASSCF minimum energy crossing point (MECP) calculations for the doublet/quartet state pairs were performed, and then the CASPT2 energies and CASSCF spin-orbit couplings were calculated at the MECPs. Our calculations predict eight S-loss predissociation processes (via MECPs and transition states) for the C, D, and E states and the energetics for these processes are reported. This study indicates that the C and D states can adiabatically dissociate to the first O-loss dissociation limit. Our calculations (PEC and MECP) predict a predissociation process for the E state to the first O-loss limit. Our calculations also predict that the E(2) B(2) state ...Continue Reading

References

Jul 23, 2004·The Journal of Chemical Physics·Yuxiang MoGuanying Chen

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Citations

Jun 2, 2014·The Journal of Chemical Physics·Camille LévêqueRichard Taïeb

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