Silicon monoxide dimer

Snyder, L. C., and K. Raghavachari (1984). Ab initio quantum ehemical study of the dimerization of silicon monoxide. J. Chem. Phys. 80, 5076-79. 

Thermochemical calculations show that the principal vapor species in the silicon/oxygen system is the monoxide SiO. This is the most stable molecule to contain a Si-0 multiple bond. In 1969, Anderson and Ogden reported the results of matrix-isolation experiments in which the vapor over heated silica, Si02, (at 2000 K) or overheated silica/silicon mixtures (at 1600 K) was cocondensed with excess Ar or N2. These results show that alongside the monomer, SiO, the dimer Si202 (45) and trimer SisOs (46) are also trapped in the matrix. 

---