%0 Journal Article %T Accurate theoretical predictions on the mechanisms of OSiS formation and its dissociation channels %+ Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) %A Paiva, M. A. M. %A Lefloch, B. %A Galvão, B. R. L. %< avec comité de lecture %@ 0035-8711 %J Monthly Notices of the Royal Astronomical Society %I Oxford University Press (OUP): Policy P - Oxford Open Option A %V 481 %P 1858-1861 %8 2018 %D 2018 %Z 2018MNRAS.481.1858P %R 10.1093/mnras/sty2382 %K astrochemistry %K molecular data %K ISM: molecules %Z Sciences of the Universe [physics] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles %X Multireference configuration interaction calculations are performed to investigate the potential energy surface of the S+SiO and O+SiS reactions, which are of astrochemical relevance. Several singlet and triplet electronic states are calculated in order to explore the reaction paths. It is shown that although collisions with ground-state reactants do not lead to the OSiS molecule adiabatically, the probabilities for such a spin-forbidden process are high. It is also predicted that SiS is easily converted to SiO. Spin orbit couplings and other properties are also calculated and several electronic states are explored. %G English %2 https://insu.hal.science/insu-03693514/document %2 https://insu.hal.science/insu-03693514/file/sty2382.pdf %L insu-03693514 %U https://insu.hal.science/insu-03693514 %~ INSU %~ UNIV-SAVOIE %~ UGA %~ CNRS %~ INPG %~ IRSTEA %~ CNES %~ OSUG %~ IPAG %~ AGREENIUM %~ INRAE %~ UGA-COMUE %~ USMB-COMUE