“…Similarly, the isovalent cyano (CN) and silicon nitride (SiN) radicals revealed significant discrepancies in reactivity with unsaturated hydrocarbons such as acetylene (C 2 H 2 ) and ethylene (C 2 H 4 ), by bonding the carbon in the cyano (CN) and nitrogen in the silicon nitride (SiN) to the unsaturated hydrocarbons [12][13][14][15][16][17]. Considering the title reaction, the diverse chemical bonding of silicon analogous species is also evident, when comparing the silylidyne-acetylene (SiH-C 2 H 2 ) and methylidyne-acetylene (CH-C 2 H 2 ) potential energy surfaces (PESs) [18,19] as well as the cyclopropenylidene (c-CC 2 H 2 ) and silacyclopropenylidene (c-SiC 2 H 2 ) isomers in particular [20,21]. Here, cyclopropenylidene presents as a transition state, while silacyclopropenylidene has been found to be a global minimum.…”