Bulletin of the Korean Chemical Society,
Journal Year:
2024,
Volume and Issue:
45(7), P. 593 - 613
Published: May 28, 2024
Abstract
The
field
of
coordination
chemistry
has
evolved
to
intersect
with
organic
and
biochemistry,
giving
rise
the
disciplines
organometallic
bioinorganic
chemistry.
Nuclear
magnetic
resonance
(NMR)
spectroscopy
can
be
applied
for
characterizing
transition
metal
complexes,
spanning
both
diamagnetic
paramagnetic
complexes
prevalent
in
compounds
metalloproteins.
This
review
offers
a
comprehensive
overview
wide
variety
characterization
techniques,
ranging
from
basic
1
H
13
C
NMR
advanced
methods
such
as
heteronuclear
experiments,
polarization
transfer
relaxometry,
multidimensional
spectroscopy.
diverse
array
spectroscopic
outlined
here
promises
enhance
our
comprehension
facilitating
development
innovative
catalysts
therapeutics.
ChemCatChem,
Journal Year:
2023,
Volume and Issue:
15(18)
Published: July 24, 2023
Abstract
A
cobalt‐catalyzed
addition
of
hydrosilanes
to
unsaturated
carbon‐oxygen
bonds
has
been
developed,
relying
on
complexes
featuring
easily
accessible
and
inexpensive
PNP‐type
pincer
ligands.
wide
range
heterocyclic,
aliphatic,
aromatic
ketones,
including
those
containing
both
electron‐donating
electron‐withdrawing
substituents,
were
transformed
into
silyl
ethers
or
secondary
alcohols
with
high
yields.
An
important
feature
this
protocol
is
that
silanes
can
act
as
the
substrates
activators,
eliminating
need
for
external
additives
such
strong
bases.
Organometallics,
Journal Year:
2023,
Volume and Issue:
42(16), P. 2206 - 2215
Published: Aug. 8, 2023
From
the
two
organonickel(II)
scaffolds
[Ni(Phbpy)]+
and
[Ni(PyPhPy)]+
(HPhbpy
=
6-phenyl-2,2′-bipyridine≡HC∧N∧N
Py(HPh)Py
2,6-di-2-pyridyl-benzene≡N∧(HC)∧N)
hydrido
complexes
[Ni(C∧N∧N)H]
[Ni(N∧C∧N)H]
were
studied
in
a
combined
experimental/theoretical
approach.
The
prepared
via
reaction
of
halido
derivatives
[Ni(C∧N∧N)X]
[Ni(N∧C∧N)X]
(X
Cl,
Br)
with
Li(Et3BH)
(superhydride).
C∧N∧N
complex
undergoes
rapid
reductive
elimination
(RE)
yielding
HPhbpy
Ni
particles
even
at
lowest
temperatures,
while
PyPhPy
derivative
is
more
stable.
Low-temperature
1H
nuclear
magnetic
resonance
(NMR)
spectroscopy
allowed
detection
signal
δ
−2.86
ppm
assignable
to
ligand.
different
stabilities
can
be
directly
correlated
cis
(Phbpy)
trans
(PyPhPy)
orientations
carbanionic
phen-2-ide
group
ligand,
RE
occurs
from
position
which
also
supported
by
density
functional
theory
(DFT)
calculations
are
presented.
A
further
TD-DFT/UV–vis
absorption
study
reported
rationalize
confirm
fleeting
existence
Ni–H
moiety,
proposals
made
on
route
its
decomposition.
ChemPlusChem,
Journal Year:
2023,
Volume and Issue:
89(4)
Published: Nov. 6, 2023
Abstract
Reducing
nitro
compounds
to
amines
is
a
fundamental
reaction
in
producing
valuable
chemicals
industry.
Herein,
the
synthesis
and
characterization
of
zirconium
metal‐organic
framework‐supported
salicylaldimine‐cobalt(II)
chloride
(salim‐UiO‐CoCl)
its
application
catalytic
reduction
are
reported.
Salim‐UiO‐Co
displayed
excellent
activity
chemoselective
aromatic
aliphatic
corresponding
presence
phenylsilane
as
reducing
agent
under
mild
conditions.
catalyzed
had
broad
substrate
scope
with
tolerance
diverse
functional
groups,
including
easily
reducible
ones
such
aldehyde,
keto,
nitrile,
alkene.
MOF
catalyst
could
be
recycled
reused
at
least
14
times
without
noticeable
losing
selectivity.
Density
theory
(DFT)
studies
along
spectroscopic
analysis
were
employed
get
into
comprehensive
investigation
mechanism.
This
work
underscores
significance
MOF‐supported
single‐site
base‐metal
catalysts
for
sustainable
cost‐effective
chemical
feedstocks
fine
chemicals.
Synthesis,
Journal Year:
2024,
Volume and Issue:
56(13), P. 2031 - 2046
Published: May 14, 2024
Abstract
Palladium
nanoparticles
are
dispersed
and
stabilized
in
organically
modified
silicate
(Pd@MTES),
characterized
by
a
number
of
spectroscopic
techniques,
including
FTIR,
TEM,
SEM,
XPS.
The
catalytic
effect
this
material
toward
the
hydrosilylation
aldehydes
ketones
is
explored,
scope
reaction
investigated,
with
26
examples
provided.
This
proceeds
under
neat
conditions
via
heterogeneous
catalysis,
mechanistic
pathway
supported
DFT
calculations
proposed.
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
53(35), P. 14875 - 14886
Published: Jan. 1, 2024
A
series
of
new
bis(phenylthioether)
and
bis(benzylthioether)
compounds
(L1-L5)
having
hexahydropyrimidine,
imidazolidine
dihydroperimidine
backbones
were
synthesized.
Instead
giving
NHC
complexes,
these
undergo
facile
C-S
bond
cleavages
upon
treatment
with
Ni(II)
salts
to
selectively
give
toroidal
thiolates:
[Ni
