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Phosphazene
Phosphazenes
are a class of
chemical compounds
in which a
phosphorus
atom
is
covalently linked
to a
nitrogen
atom
by a
double bond
and to three other atoms or
radicals
by single bonds. While other substitutions produce relatively persistent compounds, in
organic synthesis
the term largely refers to species with three
amino
substituents bound to phosphorus. The compounds are unusually stable examples of the
phosphorane
class of
molecules
and have a remarkable
proton affinity
. As such, they are one of the eminent examples of neutral, organic
superbases
. Two examples are
hexachlorocyclotriphosphazene
and
bis(triphenylphosphine)iminium chloride
. Phosphazenes are also known as
iminophosphoranes
and
phosphine imides
.
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