Vol. 30, No. 10 (2018)
Synthesis of Novel Transition Metal Complexes of Pyridine Tetrazole Ligands 2163
6. G. Pompidor, A. Daleo, J. Vicat, L. Toupet, N. Giraud, R. Kahn and O.
of pyridine ring, δ ppm 2.5-3.5 (DMSO) and δ 3.52-4.00
ppm due to trapped water molecules in the metal complex,
counter ion (NHEt3) δ 2-2.5 ppm. In H NMR spectrum of
Maury, Angew. Chem. Int. Ed., 47, 3388 (2008);
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1
[Co(pytz)2(H2O)2] bis-complex, first set of signals, δ ppm 8.6,
(meta, 2H) and δ ppm 7.6 (para, 1H) due to aromatic protons of
pyridine ring; second set of signals, δ 3.52 ppm (due to proton
of water) and third set of signals, δ 2.5 ppm (due to DMSO)
was observed, which confirms the complexation has occurred
in the vicinity of metals. Similarly in [Zn (pytz)2(H2O)2] bis-
complex, the incidence of three sets of signals, first set
corresponding due to the aromatic protons of pyridine ring δ
ppm 8.34, (meta, 2H) and δ ppm 7.65 (para, 1H), second set
(δ 3.52 ppm) corresponds to water molecule, coordinated to
the metal centre in all bis complexes and the third peak corres-
ponds to solvent (DMSO) at δ 2.5 ppm). In 1H NMR analysis
of [Ru(pytz)2(H2O)2] bis complex following peaks are observed;
(δ 3.5-4 ppm, H2O) has coordinated to the metal centre and (δ
2.5 ppm, DMSO). The peaks due to aromatic protons of pyridine
ring, δ ppm 8.55, (meta, 2H) and δ ppm 7.75 (para, 1H).
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Conclusion
A series of bidentate pyridine organic ligands Hpytz,
Hpytzo are combined in vitro by conservative routine and then
used for coordination with transition metals. The ratio of
ligands used to synthesize a series of bis and tris (pytz, pytzo)
complexes with Fe, Co, Ni, Zn and Ru metal ions. The assembly
investigation and representative descriptions are determined
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on Lanthanide Complexes, Wiley-VCH, Weinheim (2008)
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1
by several spectroscopic techniques like UV, FTIR, and H
NMR. The absorption window was greatly increased from 269
to 412 nm [Ru(pytzo)3], 667nm [Zn(pytzo)2(H2O)2] as obser-
ved in zinc, ruthenium metal complexes, alike observation was
seen in terpyridine lanthanide(III) complexes because of d-d
transitions and L-S coupling (singlet-triplet state) which tunes
them in photonic applications. From these observations, the
transition metal complexes can show an impressive substitution
for photophysical spectroscopic properties as shown by
lanthanides and orthodox carboxylate complexes.
CONFLICT OF INTEREST
25. W.G. Finnegan, R.A. Henry and R. Lofquist, J. Am. Chem. Soc., 80, 3908
(1958);
26. F. Himo, Z.P. Demko, L. Noodleman and K.B. Sharpless, J. Am. Chem.
Soc., 124, 12210 (2002);
The authors declare that there is no conflict of interests
regarding the publication of this article.
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