(Carbene)→SO2 Complexes: Ligand Stabilised Carbocyclic Carbenes (lsCCCs) are Better than N-Heterocyclic Carbenes
Dalton Transactions,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Sigma
donation
and
negative
hyperconjugation
interaction
played
significant
roles
in
carbene
→
SO
2
interactions.
(
ls
CCC)
complexes
were
found
to
be
relatively
more
stable.
Язык: Английский
Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(33)
Опубликована: Май 24, 2023
Abstract
Organic
circularly
polarized
luminescence
(CPL)‐active
molecular
emitters
featuring
dynamic
propeller‐like
luminophores
were
prepared
in
one
step
from
cyclic(alkyl)(amino)
carbenes
(CAACs).
These
molecules
exhibit
through‐space
arene‐arene
π‐delocalization
and
rapid
intramolecular
inter‐system
crossing
(ISC)
line
with
their
helical
character.
Язык: Английский
An isolable, chelating bis[cyclic (alkyl)(amino)carbene] stabilizes a strongly bent, dicoordinate Ni(0) complex
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Апрель 23, 2024
Abstract
Chelating
ligands
have
had
a
tremendous
impact
in
coordination
chemistry
and
catalysis.
Notwithstanding
their
success
as
strongly
σ-donating
π-accepting
ligands,
to
date
no
chelating
bis[cyclic
(alkyl)(amino)carbenes]
been
reported.
Herein,
we
describe
chelating,
C
2
-symmetric
(alkyl)(amino)carbene]
ligand,
which
was
isolated
racemic
mixture.
The
isolation
structural
characterization
of
its
isostructural,
pseudotetrahedral
complexes
with
iron,
cobalt,
nickel,
zinc
dihalides
featuring
eight-membered
metallacycles
demonstrates
the
binding
ability
bis(carbene).
Reduction
nickel(II)
dibromide
potassium
graphite
produces
dicoordinate
nickel(0)
complex
that
features
one
narrowest
angles
measured
any
unsupported
transition
metal
complexes.
Язык: Английский
Scrutinizing the redox chemistry of group 10 complexes supported by a redox-active bis-phenolate mesoionic carbene
Polyhedron,
Год журнала:
2023,
Номер
250, С. 116786 - 116786
Опубликована: Дек. 13, 2023
We
present
the
synthesis
of
an
isostructural
series
group
10
mesoionic
carbene
complexes
with
general
formula
[M(MIC)Py]
(with
M
=
Ni
(1),
Pd
(2)
and
Pt
(3),
Py
pyridine
MIC
bis-phenolate
triazolylidene).
Their
electrochemical
properties
are
investigated,
revealing
two
quasi-reversible
oxidations
for
all
compounds,
while
no
reductions
observed.
Isolation
oxidized
species
has
been
achieved
using
either
silver
triflate
or
nitrosonium
tetrafluoroborate
nickel
platinum
complex
yielding
corresponding
mono-cationic
[1]X
[3]X
(X
OTf
BF4).
For
palladium
complex,
oxidation
reactions
yielded
different
products
4
5
in
which
and/or
phenol(oxy)
donors
were
found
to
be
labile
compared
Pt.
Additionally,
electron
transfer
reaction
was
quite
slow
short
times
led
isolation
unusual
heterobimetallic
silver-platinum
6.
The
location
redox
event
investigated
EPR
spectroscopy
computational
methods,
suggest,
that
is
mostly
centered
on
one
phenolate
anchors.
Язык: Английский
Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers
Angewandte Chemie,
Год журнала:
2023,
Номер
135(33)
Опубликована: Май 24, 2023
Abstract
Organic
circularly
polarized
luminescence
(CPL)‐active
molecular
emitters
featuring
dynamic
propeller‐like
luminophores
were
prepared
in
one
step
from
cyclic(alkyl)(amino)
carbenes
(CAACs).
These
molecules
exhibit
through‐space
arene‐arene
π‐delocalization
and
rapid
intramolecular
inter‐system
crossing
(ISC)
line
with
their
helical
character.
Язык: Английский
Swift C–C bond insertion by a 12-electron palladium(0) surrogate
Chemical Communications,
Год журнала:
2023,
Номер
59(81), С. 12104 - 12107
Опубликована: Янв. 1, 2023
The
selective
activation
of
C-C
bonds
holds
vast
promise
for
catalysis.
So
far,
research
has
been
primarily
directed
at
rhodium
and
nickel
under
harsh
reaction
conditions.
Herein,
we
report
insertion
reactions
a
12-electron
palladium(0)
surrogate
stabilized
by
cyclic(alkyl)(amino)
carbene
(CAAC)
ligand.
Benzonitrile
(1),
biphenylene
(2),
benzocyclobutenone
(3),
naphtho[b]cyclopropene
(4)
were
studied.
These
substrates
allow
elucidation
the
effect
ring
strain
as
well
hybridization
encompassing
sp3,
sp2
sp
hybridized
carbon
atoms.
All
proceed
quantitatively
or
below
room
temperature.
This
work
therefore
outlines
perspectives
mild
bond
functionalization
Язык: Английский