The
study
is
about
the
thermal
behavior
of
6
s-triazine
derivatives
containing
azide,
propynyloxy,
and
propynylamino
functional
groups
in
structure
are
analyzed,
a
mechanism
processes
was
proposed.
decomposition
compounds
studied
temperature
range
30
–
600
oC
flow
helium
by
non-isothermal
TGA
DSC
methods,
high-temperature
transformations
were
at
elevated
pressures
nitrogen
atmosphere
Crawford
bomb.
For
all
compounds,
process
occurs
several
stages,
including
formation
high-molecular
destruction
groups,
framework.
All
support
transformation
an
oxygen-free
environment
with
adiabatic
718
953
K.
both
depends
on
number
azide
molecule
their
enthalpy
formation.
With
increase
compound,
azido-acetylenic
becomes
closer
to
explosive.
reduced
products
analyzed.
Russian Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
93(7), P. RCR5125 - RCR5125
Published: July 1, 2024
The
chemistry
of
heterocyclic
compounds
has
traditionally
been
and
remains
a
bright
area
chemical
science
in
Russia.
This
is
due
to
the
fact
that
many
heterocycles
find
widest
application.
These
are
key
structural
fragments
most
drugs,
plant
protection
agents.
Many
natural
also
derivatives
heterocycles.
At
present,
more
than
half
hundreds
millions
known
collective
review
devoted
achievements
Russian
chemists
this
field
over
last
15–20
years.
presents
leading
heterocyclists
representing
both
RAS
institutes
university
science.
It
worth
noting
wide
scope
review,
terms
geography
author
teams,
covering
whole
our
large
country,
diversity
research
areas.
Practically
all
major
types
represented
review.
special
attention
focused
on
practical
applications
design
new
drugs
biologically
active
compounds,
high-energy
molecules,
materials
for
organic
electronics
photovoltaics,
ligands
coordination
chemistry,
other
rapidly
developing
advances
would
not
be
possible
without
development
fundamental
transformations
chemistry.<br>
Bibliography
—
2237
references.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
The
N3-3
molecule
has
achieved
superior
overall
performance
among
N-rich
energetic
materials
(
T
d
=
302
°C
and
D
v
9341
m
s
−1
),
which
significantly
surpasses
that
of
HMX.
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(2), P. 1758 - 1758
Published: Jan. 16, 2023
An
efficient
method
for
the
synthesis
of
pyrazolo
[4,3-b]pyridines
has
been
developed
on
basis
readily
available
2-chloro-3-nitropyridines
via
a
sequence
SNAr
and
modified
Japp-Klingemann
reactions.
The
offers
number
advantages
including
utilization
stable
arenediazonium
tosylates,
operational
simplicity
as
well
combining
azo-coupling,
deacylation
pyrazole
ring
annulation
steps
in
one-pot
manner.
unusual
rearrangement
(C-N-migration
acetyl
group)
was
observed
plausible
mechanism
proposed
based
isolated
intermediates
NMR
experiments.
In
addition,
protocol
successfully
applied
to
1-arylindazoles
reaction
cyclization
resulting
hydrazone
procedure.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(7), P. 4258 - 4267
Published: Jan. 1, 2024
The
reduction
of
the
catalyst's
dimension
is
conducive
to
facilitating
CER.
increase
Cl
−
concentration
helpful
for
accelerating
oxygen
evolution
reaction
promotes
selectivity
2
generation.
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(3), P. 2693 - 2693
Published: Jan. 31, 2023
An
optimized
synthetic
protocol
toward
the
assembly
of
Kuhn
verdazyls
based
on
an
azo
coupling
arenediazonium
salts
with
readily
available
hydrazones
followed
by
base-mediated
cyclization
in
situ
formed
formazans
formalin
was
developed.
The
scope
and
limitations
presented
method
were
revealed.
Some
new
mechanistic
insights
formation
also
conducted.
It
found
that
contradiction
previously
assumed
hypotheses,
synthesis
accomplished
via
intermediate
verdazylium
cations
which
reduced
to
leucoverdazyls.
latter
underwent
deprotonation
under
basic
conditions
generate
corresponding
anions
coproportionate
furnish
verdazyls.
spectroscopic
electrochemical
behavior
synthesized
studied.
Overall,
our
results
may
serve
as
a
reliable
basis
for
further
investigation
chemistry
applications
ChemPlusChem,
Journal Year:
2022,
Volume and Issue:
87(12)
Published: Nov. 30, 2022
A
regioselective
approach
toward
the
synthesis
of
a
set
new
(2-vinyltetrazolyl)furoxans
as
potential
energetic
monomers
has
been
realized.
All
target
materials
were
thoroughly
characterized
by
spectral
and
analytical
methods.
Moreover,
crystal
structures
two
representative
heterocyclic
systems
studied
single-crystal
X-ray
diffraction.
Prepared
high-energy
substances
have
high
combined
nitrogen-oxygen
content
(63-71
%),
enthalpies
formation
good
detonation
parameters
(D:
6.7-7.8
km
s-1;
P:
18-28
GPa).
Mechanical
sensitivities
synthesized
vinyltetrazoles
range
these
explosives
from
highly
sensitive
to
completely
insensitive.
Using
calculations
molecular
electrostatic
potentials
(ESP),
structural
factors
influencing
impact
sensitivity
revealed.
Overall,
newly
are
interest
promising
due
presence
vinyl
moiety
explosophoric
combination,
while
their
performance
exceeds
that
benchmark
explosive
TNT.
Physical Chemistry Chemical Physics,
Journal Year:
2023,
Volume and Issue:
25(46), P. 32071 - 32077
Published: Jan. 1, 2023
Modeling
of
the
structure
molecules
and
simulation
crystal
followed
by
calculation
enthalpies
formation
for
21
salts
three
high-energy
tetrazole
1N-oxides:
5-nitro-1-hydroxy-1H-tetrazole
1a-1g,
5-trinitromethyl-1-hydroxy-1H-tetrazole
2a-2g
6-amino-3-(1-hydroxy-1H-tetrazol-5-yl)-1,2,4,5-tetrazine
1,5-dioxide
3a-3g
was
performed.
The
methods
quantum
chemistry
method
atom-atom
potentials
were
used.
Structural
search
optimal
packings
carried
out
in
11
most
common
space
symmetry
groups.
obtained
analyzed
using
two
different
approaches:
VBT
MICCM
methods,
which
allowed
to
evaluate
quality
these
methods.
In
addition,
results
indicate
high
values
thermochemical
characteristics
some
considered
compounds,
have
a
positive
effect
on
their
explosive
properties
unveil
future
application
potential.
