Journal of Coordination Chemistry,
Journal Year:
2023,
Volume and Issue:
76(9-10), P. 1157 - 1172
Published: May 19, 2023
Centrosymmetric
homopolynuclear
Cu(II)
and
Co(II)
chelated
complexes,
[Cu2(L)(H2O)2]
(1)
[Co4(L)(μ-OAc)2(CH3OH)4(OAC)2]⋅2CH2Cl2
(2),
were
synthesized
using
a
new
symmetrical
methoxy-disubstituted
bis(salamo)-type
ligand,
H4L,
with
salts
in
organic
solvents.
Complexes
1
2
structurally
characterized
by
single-crystal
X-ray
crystallography.
The
results
indicated
that
is
five-coordinate
dinuclear
structure
containing
tetranuclear
complex
two
distinct
six-coordinate
environments.
Furthermore,
pack
into
three-dimensional
two-dimensional
extended
networks,
respectively.
UV–Vis
spectra,
IR
Hirshfeld
surface
analyses
of
the
complexes
carried
out
to
further
characterize
coordination
between
H4L
metal(II)
ions.
Fluorescence
methods
used
interrogate
coordination,
where
changes
emission
varied
amounts
ligand
supported
solution-phase
ratios
ion
1:2
1:4,
Journal of Coordination Chemistry,
Journal Year:
2022,
Volume and Issue:
75(15-16), P. 2228 - 2244
Published: Aug. 18, 2022
Two
structurally
different
Cu(II)
and
Co(II)
complexes,
[Cu(L)]
(1)
[Co2(L)2]⋅2CH3OH
(2),
constructed
from
a
new
polyhalogen-substituted
unsymmetric
salamo-based
ligand
(H2L,
4-chloro-4′-bromo-6-bromo-6′-tert-butyl-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol)
were
synthesized
by
wet-chemical
methods.
Complexes
1
2
characterized
through
elemental
analyses,
IR
UV-vis
spectroscopies
single
crystal
X-ray
crystallography.
In
addition,
the
differences
of
structures,
electronic
absorption
characteristics
fluorescence
property
transitions
to
complexes
studied.
The
largest
difference
is
that
H2L
can
react
with
M(OAc)2
(M
=
Co(II))
give
two
distinct
structures
behaviors.
There
are
chemically
identical
but
crystallographically
independent
structural
units
(molecules
A
B)
in
1.
Moreover,
each
ion
(Cu1
or
Cu2)
four-coordinate
possesses
square
planar
geometry,
both
ions
bridged
phenoxide
possess
five-coordinate
trigonal
bipyramidal
configurations.
At
same
time,
Hirshfeld
surface
analyses
showed
there
short-range
interaction
features
2,
O···H/H···O
interactions
significantly
stronger
than
those
2.
