Triple Bonds of the Heavy Main‐Group Elements: Acetylene and Alkylidyne Analogues of Group 14

Carbon copies? Compounds containing homo- and heteronuclear multiple bonds involving the heavier Group 14 elements have become available in the past few years. The most recent example is the cationic complex 1 (Mes=mesityl=2,4,6-trimethylphenyl), for which the structural analysis and DFT calculations indicate a pronounced silylidene character and a nonclassical H⋅⋅⋅Si interaction.