A base-stabilized germavinylidene

Bin Li (), Jiancheng Li, Yanling Zhu, Jicheng Wang, Yuanyuan Wang, Manbo Zhang and Liu Leo Liu ()
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Bin Li: Hunan Normal University
Jiancheng Li: Southern University of Science and Technology
Yanling Zhu: Hunan Normal University
Jicheng Wang: Hunan Normal University
Yuanyuan Wang: Hunan Normal University
Manbo Zhang: Hunan Normal University
Liu Leo Liu: Southern University of Science and Technology

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Germavinylidenes (R2C=Ge), the heavier congeners of vinylidenes, have long remained elusive, both as free species and in Lewis base-stabilized forms. Herein, we report the isolation of a base-stabilized germavinylidene employing an imine-functionalized cyclic (alkyl)(amino)carbene (imino-CAAC) ligand. Comprehensive structural characterization, supported by theoretical calculations, confirms the presence of a Ge=C double bond, with the divalent germanium center coordinated by the imine donor. Preliminary reactivity studies reveal a rich chemical profile: the complex undergoes selective methylation at the germanium center, forms a π-dominated coordination complex with iron carbonyl, and acts as a germanium atom transfer reagent to generate a rare tetraazagermylene. Furthermore, a [2 + 2] cycloaddition with isocyanate provides compelling evidence for the Ge=C double bond character. These results underscore the previously unexplored potential of imino-CAAC ligands in stabilizing reactive and uncharted p-block main group species.

Date: 2025
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DOI: 10.1038/s41467-025-65001-w

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