A Cyclic Germadicarbene (“Germylone”)
from Germyliumylidene
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Abstract
By
employing the chelate dicarbene <b>1</b>, the new chlorogermyliumylidene
complex <b>2</b> could be synthesized and isolated in 95% yield.
Dechlorination of <b>2</b> with sodium naphthalenide furnishes
the unique cyclic germadicarbene <b>3</b> which could be isolated
in 45% yield. Compound <b>3</b> is the first isolable Ge(0)
complex with a single germanium atom stabilized by a dicarbene. Its
molecular structure is in accordance with DFT calculations which underline
the peculiar electronic structure of <b>3</b> with two lone
pairs of electrons at the Ge atom