SiS, one of the few interstellar molecules containing silicon, has been recently detected in a shocked region around a Sun-like protostar (L1157-B1). SiO has also been detected in the same region. Nevertheless, while SiO seems to be directly released from grains or rapidly formed from atomic Si released in the strong shock, SiS seems to be formed through slow gas-phase processes using part of the released silicon. In this contribution we explore possible gas-phase formation route of SiS starting from simple and relatively common interstellar species containing sulfur and silicon. In particular, we have performed electronic structure calculations of the potential energy surfaces of four possible reactions at the CCSD(T)/aug-cc-pV(T+d)Z//B3lyp/aug-cc-pV(T+d)Z level. Kinetic calculations have been performed in order to select the main reaction channels leading to SiS in the interstellar conditions.  <br/>

Theoretical investigation of possible formation routes of interstellar SiS

255th National Meeting (2018)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.