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Π-Character of Chromium Germylyne Complex in the Reactions with Enone, Butadiene, and Alkynes: Formation of Germacycles through [2+4] Cycloaddition with Conjugated Molecules. | LitMetric

AI Article Synopsis

  • * A similar η-allyl complex 3 with a germacyclopentenyl ring was produced when complex 1 reacted with butadiene under light, resulting in the cleavage of the Cr≡Ge bond.
  • * In contrast, reactions of complex 1 with alkynes, also under light, led to a substitution of a CO ligand, producing η-alkyne germylyne complexes while preserving the Cr≡Ge triple bond.

Article Abstract

Germylyne complex Cp*(OC) Cr≡Ge{C(SiMe ) } (1) reacted with methyl vinyl ketone to give an η -allyl complex 2 with an oxagermacyclopentenyl ring. An analogous η -allyl complex 3 with a germacyclopentenyl ring was obtained by the reaction with butadiene, a non-polar conjugated molecule, under photoirradiation. These reactions are accompanied by cleavage of the Cr≡Ge triple bond. On the other hand, the reactions of complex 1 with alkynes under photoirradiation resulted in clean substitution of a CO ligand of 1 to afford (η -alkyne)germylyne complexes, where the Cr≡Ge triple bond is intact.

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Source
http://dx.doi.org/10.1002/asia.202300801DOI Listing

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