At present, the use of low-valent derivatives of the
main group
elements, including metallylenes, etc., in catalysis as an alternative
to transition metals is widely discussed. The high reactivity of these
compounds often requires their stabilization by using electron-pair
donor ligands. The influence of the latter on oxidative addition reactions
is usually not considered. In this work, to the best of our knowledge
for the first time, using the example of the oxidative insertion of
Lappert’s germylene into PhSSPh in the presence of N, S, P,
and O donor ligands, we show that the ligands significantly increase
the reaction rate. This can be associated with an increase in the
level of the germylene highest occupied molecular orbital under the
influence of a donor. Qualitatively, the obtained values of the reaction
rate constants correlate well with the germylene oxidation potentials
in the presence of ligands or ligand oxidation potentials.
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