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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kobylka, Michal J. Klak, Julia Lis, Tadeusz Kowalik-jankowska, Teresa Pietruszka, Marta Janczak, Jan Lisowski, Jerzy |
| Description | Author Affiliation: Kobylka MJ ( Department of Chemistry, University of Wroclaw, 14 F. Joliot-Curie, 50-383, Wroclaw, Poland. michal.kobylka@chem.uni.wroc.pl) |
| Abstract | Enantiopure trinuclear Cu(II) complexes 3 and 4 of macrocyclic amine 1 derived from the 3 + 3 condensation of 2,6-diformyl-4-methylphenol and (1 S,2 S)-1,2-diaminocyclohexane have been synthesized and characterized by ESI MS and NMR spectroscopy . The X-ray crystal structures of both complexes have been determined. The structure of the chloride derivative 3 indicates unusual combination of distorted tetragonal bipyramidal, square pyramidal and square geometries of the three Cu(II) ions bound by macrocycle 1. The acetate complex 4 also exhibits unsymmetrical trinuclear core with the bridging and terminal acetate anions. The complexation of Cu(II) ions by macrocycle 1 has been studied using potentiometric methods and both protonation and binding constants of 1 have been determined. The distribution of the complex forms indicates cooperative binding of three metal ions by 1. The overall magnetic behaviour for 3 corresponds to an antiferromagnetically coupled triangular system. Compound 4 shows the presence of antiferromagnetic coupling (J = −74.9(1) $cm^{−1})$ between the metal centers in equilateral triangular array. |
| ISSN | 14779226 |
| Issue Number | 5 |
| Journal | Dalton Trans. |
| Volume Number | 41 |
| e-ISSN | 13645447 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Publisher Date | 2012-02-07 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Subscribed |
| Subject Keyword | Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Inorganic Chemistry |
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