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Diverse coordination of schiff bases based on 2-(aminomethyl)pyridine or 2-acetylpyridine at Mo(IV) centre : synthesis, crystal structures and physicochemical properties
Diverse coordination of schiff bases based on 2-(aminomethyl)pyridine or 2-acetylpyridine at Mo(IV) centre : synthesis, crystal structures and physicochemical properties
Diverse coordination of schiff bases based on 2-(aminomethyl)pyridine or 2-acetylpyridine at Mo(IV) centre : synthesis, crystal structures and physicochemical properties
pl
dc.type
JournalArticle
pl
dc.description.physical
127-134
pl
dc.description.additional
Na publikacji autorka Tomecka-Wątroba Monika podpisana jako Tomecka Monika.
pl
dc.abstract.en
The reaction of Schiff bases formed in reaction of 2-(aminomethyl)pyridine and aliphatic ketones
(acetone, dihexyl ketone, 2- and 4-heptanone) or 2-acetylpyridine and 2-aminoethanol with
K
3
Na[Mo(CN)
4
O
2
]
6H
2
O in water–ethanol solution results in isolation of two new complexes of formulae:
(PPh
4
)[Mo(CN)
3
O(ampy)]
2H
2
O(
1
) (ampy = 2-(aminomethyl)pyridine) and (PPh
4
)[Mo(CN)
3
O(acea-
met)]
2H
2
O(
2
) (aceamet = 2-{[1-(pyridin-2-yl)ethyl]amino}ethanol). The isolated salts were character-
ized by elemental analysis, single crystal X-ray structure measurements, IR and UV–Vis spectroscopy
and cyclic voltammetry. The complexes crystalize in monoclinic (
1
) or triclinic (
2
) space group with very
distorted geometry of the anion with almost identical Mo
@
O distance (1.674 and 1.673 Å for
1
and
2
,
respectively). The energy of intense MLCT transitions in visible part of the spectra were found to be
dependent on pyridine ring position (
cis
in
1
and
trans
in
2
)toMo
@
O bond and show strong solvatochro-
mic effect dependent on the nature of the solvent. The very unusual position of pyridine ring in
2
as well
as coordination of only 2-(aminomethyl)pyridine in
1
is discussed in terms of the reaction scheme in
which for both salts only Schiff base ligand components [chelating 2-(aminomethyl)pyridine or 2-acetyl-
pyridine] are coordinated at first reaction step. The results presented in paper indicate, that the Schiff
bases cannot be treated as typical stable organic ligands, but rather as a complex system. The metal
(or complex) determine which element of this system and in what sequence is coordinated.
pl
dc.subject.en
molybdenum
pl
dc.subject.en
complexes
pl
dc.subject.en
schiff bases
pl
dc.subject.en
X-ray diffraction
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dc.subject.en
pyridine
pl
dc.description.volume
75
pl
dc.identifier.doi
10.1016/j.poly.2014.03.021
pl
dc.identifier.eissn
1873-3719
pl
dc.title.journal
Polyhedron
pl
dc.language.container
eng
pl
dc.affiliation
Wydział Chemii : Zakład Krystalochemii i Krystalofizyki
pl
dc.affiliation
Wydział Chemii : Zakład Chemii Nieorganicznej
pl
dc.subtype
Article
pl
dc.rights.original
bez licencji
pl
.pointsMNiSW
[2014 A]: 30
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