ISMSC 2007 - Università degli Studi di Pavia

Novel Copper(II) and Nickel(II) [2×2] Molecular Grids based on a
Polynucleative Oxime-containing Shiff Base Ligand
I. S. Moroz a , M. Haukka b and I. O. Fritsky a
a Department of Chemistry, Kiev National Taras Shevchenko University, 01033 Kiev, Ukraine
b Department of Chemistry, University of Joensuu, 80101 Joensuu, Finland
One of the most succesfull approaches for obtaining polynuclear coordination compounds is
use of well-designed polynucleative ligand systems. In this work we present copper(II) and
nickel(II) compounds with novel polyfunctional Schiff base ligand 2-(hydroxyimino)-N'-(1-
(pyridin-2-yl)ethylidene)propanehydrazide (pop), which contain several donor functions (oximic,
hydrazide, hydrazone and pyridine cycle).
The synthesized complexes have been characterized by
a variety of spectral methods; three of them [Cu4(pop-
2H)4(H2O)4] (1), [Cu4(pop-2H)4(HCOOH)4] (2) and
[Ni4(pop-H)4(HCOO)4] (3) were studied by X-ray single
crystal analysis. The complexes 1-3 indicate [22]
pop
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molecular grid structure and comprise of tetranuclear sixcoordinated
metal arrays. In the nickel complex two types
of chromophors are realized (NiN2O4 and NiN4O2). On the other hand, for the copper complexes
only one type of chromophor (CuN3O3) is observed. The coordination of pop is realized in a
tetradentate mode via the pyridine, azomethine and oximic nitrogen atoms and the bridging
amide oxygen atom.
Molecular structure of 3
The average metal-metal separation in all cases is ca. 4 Å, the M--M angles are in the range
137-139 o for 3 and 139-142 o for 1, 2.
4-(4-Thiocarbamoyl-1,2,3-triazol-1-yl)benzoannelated Crown Ethers as
Amino Acid's Receptors.
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Yuri Yu. Morzherin, Polina E. Kropotina, Tatiana V. Glukhareva, Nadezhda A. Itsikson, Anatoly
I. Matern
Urals State Technical University, Chemical Technology Faculty, Mira, 19, 620002, Ekaterinburg,
Russia
In the last decade, considerable effort has been devoted to molecular recognition and/or
selforganization within the field of supramolecular chemistry. One of the most noticeable
aspects in this interdisciplinary area is the emergence of the wide range of intriguing
compounds specially designed and created on the basis of complimentary to function as
sensors and receptors for biological and abiotic particles. Extensive studies of non-covalent
interactions between synthetic receptors and simple species as cations, anions and small and
simple neutral molecules have not only led to various molecular and supramolecular devices
but, more significantly, had a big impact on the development of modern chemistry as well. A
challenging research area in this field is the design and construction of sophisticated artificial
receptors with polytopicity and polyfunctionality that would be highly efficient in complexation
with more complicated molecules. A convenient method for one-step modification of crown
ether by nitrogen containing heterocycle based on the methodology of rearrangements of 1,2,3thiadiazoles.
Now we report the synthesis of amino acid's receptor.
The complexating properties of obtained crown ether toward amino acids have been studied by
used various methods. We was shown that benzocrown ether containing the 4-thiocabamoyl-
1,2,3-triazole is receptors for amino acid.
This work was financially supported by the grants Russian Foundation of Basic Researches 05-
03-32094