Stibasilene SbSi and Its Lighter Homologues: A Comparative Study

The multiply bonded derivatives of
the heavier main group elements
are among the most challenging targets for synthetic pursuits. Those
of them featuring a double bond between the silicon and group 15 element
are represented mostly by the silaimines NSi< and phosphasilenes PSi<
with a very few examples
of arsasilenes AsSi<. In this contribution, we
report on the synthesis and structural elucidation of the first stable
stibasilene and novel phosphasilene and arsasilene derivatives, featuring
an identical substitution pattern. A systematic comparison within
the series phosphasilene–arsasilene–stibasilene is made
on the basis of their experimental and computational studies.