Due to extremely low pressure and temperature, numerous highly reactive unsaturated Group 14 species have been detected in interstellar space. Under laboratory conditions their isolation requires kinetic and/or electronic stabilization. Initially after the discovery of sufficiently stable examples the focus rested predominantly on structure and reactivity. The incompatibility of functional groups with such motifs had almost paradigmatic status. Since about 20 years, functionalized derivatives have become available for the transfer of unsaturated Group 14 moieties allowing for the synthesis of larger systems and shedding light on the mechanisms governing their formation. Heavier carbenes, alkenes, vinylidenes, benzenes and benzene isomers with nucleophilic or electrophilic groups provide access to structural motifs completely unknown from carbon chemistry.<br/>The lecture will give an account on the exploration of a completely unmapped chemical space with special focus on anionically functionalized silicon clusters.

Thinking outside the carbon box: Stable unsaturated silicon species

ACS Fall 2021

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