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NONO2

NONO2 is a chemical species that is sometimes used as a shorthand label for dinitrogen trioxide (N2O3). It is an unstable oxide of nitrogen that largely exists as a transient intermediate in reactions involving nitric oxide (NO) and nitrogen dioxide (NO2), collectively known as the NOx system.

Chemical properties and structure

N2O3 has the formula N2O3 and is considered the anhydride of nitrous acid (HNO2). It forms primarily

Occurrence and applications

In atmospheric chemistry, N2O3 is detected only in trace amounts and acts as a transient intermediate in

Safety

N2O3 is a reactive and potentially hazardous species. It is corrosive and can irritate the eyes, skin,

See also

Dinitrogen tetroxide (N2O4), nitrogen oxides (NOx), nitrous acid (HNO2).

by
the
combination
of
NO
and
NO2:
NO
+
NO2
⇄
N2O3.
In
the
gas
phase,
it
is
present
in
equilibrium
with
its
precursor
gases
and
readily
hydrolyzes
in
water
to
produce
HNO2.
The
molecule
is
typically
described
with
resonance
forms
that
reflect
a
bond
arrangement
between
the
two
nitrogen
atoms
and
the
surrounding
oxygen
atoms.
Due
to
its
reactive
nature,
N2O3
is
short-lived
under
standard
conditions
and
tends
to
decompose
back
to
NO
and
NO2.
the
chemistry
of
nitrogen
oxides.
It
is
primarily
of
interest
to
researchers
studying
NOx
cycling,
the
formation
of
nitrite/nitrate
species,
and
related
air
chemistry.
There
is
no
broad
industrial
use
for
NONO2/N2O3,
outside
of
specialized
laboratory
investigations.
and
respiratory
system.
It
can
hydrolyze
to
produce
acidic
species
such
as
nitrous
acid,
and
it
should
be
handled
with
appropriate
safety
precautions
in
well-ventilated
laboratories
or
controlled
environments.