Structural properties of Cyclopentanone-bridged Bis-Macrocyclic Ligand Dicopper(II) complexes in the solid and in solution: a successful test of the MM-EPR method
The copper(II)-assisted condensation of 2,3,2-tet (3,7-diazanonane-1,9-diamine) with formaldehyde and cyclopentanone yields the mono- and bis-macrocyclic Mannich condensation products L1 and L2, as well as the Schiff-base product L3, all with cyclam-type tetraaza macrocycles, coordinated to copper(I...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
05/08/2003
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| In: |
Inorganic chemistry
Year: 2003, Volume: 42, Issue: 11, Pages: 3387-3389 |
| ISSN: | 1520-510X |
| DOI: | 10.1021/ic026265r |
| Online Access: | Verlag, Pay-per-use, Volltext: http://dx.doi.org/10.1021/ic026265r Verlag, Pay-per-use, Volltext: https://doi.org/10.1021/ic026265r 
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| Author Notes: | Peter Comba, Marion Kerscher, Yaroslaw D. Lampeka, Lutz Lötzbeyer, Hans Pritzkow, and Lyudmyla V. Tsymbal |
| Summary: | The copper(II)-assisted condensation of 2,3,2-tet (3,7-diazanonane-1,9-diamine) with formaldehyde and cyclopentanone yields the mono- and bis-macrocyclic Mannich condensation products L1 and L2, as well as the Schiff-base product L3, all with cyclam-type tetraaza macrocycles, coordinated to copper(II). The combination of molecular mechanics and EPR spectroscopy (MM-EPR) reveals that all three isomers of [Cu2(L2)(OH2)n]2+ (n = 0−4), with the expected trans-III (R,R,S,S) configuration of the 14-membered tetraaza macrocycles, are of similar stability, and that the isomer whose structure is solved by X-ray crystallography has a different structure in solution. |
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| Item Description: | Gesehen am 21.02.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1520-510X |
| DOI: | 10.1021/ic026265r |