Included in the study were 23 silicon hydrides (SixHy) with up to 5 silicon atoms, 37 hydrocarbons with up to 5 carbon atoms, 36 Si−C molecules (SixCyHz), Six (x = 1−6), Cx (x = 1−6), and 16 small Si−C clusters: SixCy (from x + y = 2 up to x + y = 6).