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1

New Dinuclear Nonaazadentate Schiff Base Podates of Rare Earth(III) Ions

Patroniak V.

Polish Journal of Chemistry

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2005

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Vol. 79 / nr 1

57-64

EN

As a result of [1+2] Schiff base condensation in the template reaction between 2,6-diacetylpyridine and 3,7-diazanonane-1,9-diamine in the presence of rare earth(III) ions (M = Y3+, La3+, Pr3+, Sm3+, Eu3+, Gd3+, Tb3+, Ho3+, Er3+, Tm3+, Yb3+), new dinuclear architectures containing a ligand with N9 set of donor atoms with terminal amine groups have been formed. The complexes have been characterized by the spectroscopic and thermogravimetric data and microanalyses.

2

Metal-Ion-Directed Synthesis of the New Macrocyclic and Acyclic Homo- and Heterodinuclear Schiff Base Complexes Derived from Putrescine

Radecka-Paryzek W., Kaczmarek M., Luks E., Pospieszna-Markiewicz I.

Polish Journal of Chemistry

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2005

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Vol. 79 / nr 10

1597-1604

EN

The template reaction of 2,6-diacetylpyridine with putrescine, a biogenic diamine, in the presence of lanthanum(III) and zinc(II) ions produces homo- and heteronuclear complexes of 22-membered macrocyclic ligand with an N6 set of donor atoms as a result of the [2+2] Schiff base cyclocondensation. Complexes containing Schiff base acyclic ligands terminated by two carbonyl groups or one carbonyl and one amine group as products of the partial metal-promoted condensation have been also isolated. They might be regarded as possible intermediates in the formation of the macrocyclic complexes. The complexes have been characterized by spectral data (IR, 1H NMR, ESI-MS) and elemental analyses.

3

Synthesis and Magnetic Properties of Dinuclear Oxovanadium(IV) Complexes Bridged by Tetracarboxylato Groups

Li Y., Yan C., Guan H.

Polish Journal of Chemistry

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2004

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Vol. 78 / nr 1

1-7

EN

Three novel _-tetracarboxylato-bridged oxovanadium(IV) dinuclear complexes described by the overall formula [(VO)2(PMTA)L2], where PMTAstands for the tetraanion of pyromellitic acid, and L denotes 2,2_-bipyridine (bpy), 4,4_-dimethyl-2,2_-bipyridine (Me2bpy) or 1,10-phenanthroline (phen), respectively, have been synthesized and characterized by elemental analyses, molar conductivity and room-temperature magnetic moment measurements, IR, ESR and electronic spectral studies. It is proposed that these complexes have PMTA-bridged structures and consist of two oxovanadium(IV) ions, each in a square-pyramidal environment. The [(VO)2(PMTA)(bpy)2] (1) and [(VO)2(PMTA)(phen)2] (2) complexes were further characterized by variable temperature (4.2~300 K) magnetic susceptibility measurements and the observed data were fitted to the modified Bleaney-Bowers equation by the least-squares method, giving the exchange integral J = -2.75 cm-1 for (1) and J = -3.91 cm-1 for (2). This result indicates that there is a weak antiferromagnetic spin-exchange interaction between the two VO2+ ions within each molecule.

4

Metal-Ion-Directed Synthesis of Homo- and Heteronuclear Dimetallic Schiff Base Podates. II.

Radecka Paryzek W., Kaczmarek M. T., Pospieszna-Markiewicz I.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 5

679-685

EN

Homodinuclear complexes with magnesium(II), calcium(II), and barium(II) ions and heterodinuclear complexes with calcium(II) or cadmium(II) and lanthanide(III) ions containing Schiff base open-chain ligand terminated by one amine and one carbonyl group were prepared as a result of the partial Schiff base condensation reaction between 2,6-diacetylpyridine and 4-methyl-1,2-phenylenediamine in the presence of the appropriate ions acting as templates. The complexes were characterized by spectroscopic methods (IR, 1H NMR, FAB-MS), thermogravimetric and elemental analyses.

5

Metal-Ion-Directed Synthesis of Homo-and Heteronuclear Dimetallic Schiff Base Podates

Radecka Paryzek W., Kaczmarek M. T., Luks E.

Polish Journal of Chemistry

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2001

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Vol. 75, nr 1

35-42

EN

Homodinuclear complexes of lanthanum(III), zinc(II), cadmium(II) and mercury(II) ions and heterodinuclear complexes of lanthanum(II) and zinc(II) ions containing Schiff base open-chain ligands terminated by two carbonyl groups or one amine and one carbonyl group were prepared as a result of the partial Schiff base condensation reaction between 2,6-diacetylpyridine and 4-methyl-1,2-phenylenediamine or 2,6-diaminopyridine in the presence of the appropriate ions acting as templates. The complexes were characterized by spectroscopic methods (IR, 1H NMR, FAB-MS) and elemental analysis.