TY - JOUR
T1 - Cd(ΙΙ) and Mn(ΙΙ) complexes of a new hexadentate Schiff base ligand derived from an asymmetric tripodal tetraamine and 2-pyridinecarboxaldehyde
AU - Salehzadeh, Sadegh
AU - Golbedaghi, Reza
AU - Tidmarsh, Ian S.
AU - Al-Rasbi, Nawal K.
AU - Adams, Harry
AU - Ward, Michael D.
PY - 2008/12/12
Y1 - 2008/12/12
N2 - Two new compounds, [CdL22pyfp(NO3)](ClO4) (1) and [MnL22pyfpCl](ClO4) (2), were prepared by the template condensation of a previously known ligand, (L22py), and 2-pyridinecarboxaldehyde in the presence of Cd(NO3)2 · 4H2O or MnCl2 · 4H2O in equimolar ratios. The resulting compounds were characterized by elemental analysis, IR and single crystal X-ray diffraction, and by NMR in the case of the Cd(II) complex. The Cd(II) ion is in an eight-coordinate environment that is best described as a distorted dodecahedron. The environment around the Mn(II) ion may be described as a distorted pentagonal bipyramid. The 1H NMR spectrum of the cadmium complex shows the signal of the imine proton to have two satellites (3J = 44.4 Hz) with intensities of 1:6:1 due to coupling with the neighboring 111/113Cd atom. The electronic spectra of both complexes, as well as the ligand, is explained on the basis of TD-DFT calculations.
AB - Two new compounds, [CdL22pyfp(NO3)](ClO4) (1) and [MnL22pyfpCl](ClO4) (2), were prepared by the template condensation of a previously known ligand, (L22py), and 2-pyridinecarboxaldehyde in the presence of Cd(NO3)2 · 4H2O or MnCl2 · 4H2O in equimolar ratios. The resulting compounds were characterized by elemental analysis, IR and single crystal X-ray diffraction, and by NMR in the case of the Cd(II) complex. The Cd(II) ion is in an eight-coordinate environment that is best described as a distorted dodecahedron. The environment around the Mn(II) ion may be described as a distorted pentagonal bipyramid. The 1H NMR spectrum of the cadmium complex shows the signal of the imine proton to have two satellites (3J = 44.4 Hz) with intensities of 1:6:1 due to coupling with the neighboring 111/113Cd atom. The electronic spectra of both complexes, as well as the ligand, is explained on the basis of TD-DFT calculations.
KW - Ab initio
KW - Cadmium complex
KW - Manganese complex
KW - Template condensation
KW - Tripodal Schiff base ligands
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U2 - 10.1016/j.poly.2008.08.019
DO - 10.1016/j.poly.2008.08.019
M3 - Article
AN - SCOPUS:56349103534
SN - 0277-5387
VL - 27
SP - 3549
EP - 3556
JO - Polyhedron
JF - Polyhedron
IS - 18
ER -