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Synthesis, Crystal Structure and Magnetic Properties of a Trinuclear Copper(II) Complex Based on P-Cresol-Substituted Bis(α-Nitronyl Nitroxide) Biradical
| Content Provider | MDPI |
|---|---|
| Author | Grenda, Sabrina Beau, Maxime Luneau, Dominique |
| Copyright Year | 2022 |
| Description | Trinuclear copper(II) complex [Cu^{II}$_{3}(NIT_{2}PhO)_{2}Cl_{4}$] was synthesized with p-cresol-substituted bis(α-nitronyl nitroxide) biradical: 4-methyl-2,6-bis(1-oxyl-3-oxido-4,4,5,5-tetramethyl-2-imidazolin-2-yl)phenol $(NIT_{2}$PhOH). The crystal structure of this heterospin complex was determined using single-crystal X-ray diffraction analysis and exhibits four unusual seven-membered metallocycles formed from the coordination of oxygen atoms of the N-O groups and of bridging phenoxo $(µ-PhO^{−}$) moieties with copper(II) ions. The crystal structure analysis reveals an incipient agostic interaction between a square planar copper center and a hydrogen-carbon bond from one methyl group carried on the coordinated nitronyl-nitroxide radical. The intramolecular Cu∙∙∙H-C interaction involves a six-membered metallocycle and may stabilize the copper center in square planar coordination mode. From the magnetic susceptibility measurements, the complex, which totals seven S = 1/2 spin carriers, has almost a ground state spin S = 1/2 at room temperature ascribed to strong antiferromagnetic interaction between the nitronyl nitroxide moieties and the copper(II) centers and in between the copper(II) centers through the bridging phenoxo oxygen atom. |
| Starting Page | 3218 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules27103218 |
| Journal | Molecules |
| Issue Number | 10 |
| Volume Number | 27 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-18 |
| Access Restriction | Open |
| Subject Keyword | Molecules Inorganic Chemistry Nitronyl Nitroxide Biradical Molecular Magnetism Copper Complex |
| Content Type | Text |
| Resource Type | Article |
