Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions
Upon the interaction of the hydrated lanthanide(III) salts found in acetonitrile solution with a tripodal paramagnetic compound, 4,4-dimethyl-2,2-bis(pyridin-2-yl)-1,3-oxazolidine-3-oxyl (Rad), functionalized by two pyridyl groups, three neutral, structurally characterized complexes with diamagnetic...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/5/1626 |
| _version_ | 1797474365360570368 |
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| author | Philippe Rey Anton I. Smolentsev Kira E. Vostrikova |
| author_facet | Philippe Rey Anton I. Smolentsev Kira E. Vostrikova |
| author_sort | Philippe Rey |
| collection | DOAJ |
| description | Upon the interaction of the hydrated lanthanide(III) salts found in acetonitrile solution with a tripodal paramagnetic compound, 4,4-dimethyl-2,2-bis(pyridin-2-yl)-1,3-oxazolidine-3-oxyl (Rad), functionalized by two pyridyl groups, three neutral, structurally characterized complexes with diamagnetic polydentate ligands—[Dy(RadH)(hbpm)Cl<sub>2</sub>], [Yb<sub>2</sub>(ipapm)<sub>2</sub>(NO<sub>3</sub>)<sub>4</sub>], and [Ce<sub>2</sub>(ipapm)<sub>2</sub>(NO<sub>3</sub>)<sub>4</sub>(EtOAc)<sub>2</sub>]—were obtained. These coordination compounds are minor uncolored crystalline products, which were formed in a reaction mixture due to the Rad transformation in a lanthanide coordination sphere, wherein the processes of its simultaneous disproportionation, hydrolysis, and condensation proceed differently than in the absence of Ln ions. The latter fact was confirmed by the formation of the structurally characterized product of the oxazolidine nitroxide transformation during its crystallization in toluene solution. Such a conversion in the presence of 4f elements ions is unique since no similar phenomenon was observed during the synthesis of the 3<i>d</i>-metal complexes with Rad. |
| first_indexed | 2024-03-09T20:28:59Z |
| format | Article |
| id | doaj.art-42328094976242579d747012375447c1 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T20:28:59Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-42328094976242579d747012375447c12023-11-23T23:27:20ZengMDPI AGMolecules1420-30492022-03-01275162610.3390/molecules27051626Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> IonsPhilippe Rey0Anton I. Smolentsev1Kira E. Vostrikova2Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, RussiaNikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, RussiaNikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, RussiaUpon the interaction of the hydrated lanthanide(III) salts found in acetonitrile solution with a tripodal paramagnetic compound, 4,4-dimethyl-2,2-bis(pyridin-2-yl)-1,3-oxazolidine-3-oxyl (Rad), functionalized by two pyridyl groups, three neutral, structurally characterized complexes with diamagnetic polydentate ligands—[Dy(RadH)(hbpm)Cl<sub>2</sub>], [Yb<sub>2</sub>(ipapm)<sub>2</sub>(NO<sub>3</sub>)<sub>4</sub>], and [Ce<sub>2</sub>(ipapm)<sub>2</sub>(NO<sub>3</sub>)<sub>4</sub>(EtOAc)<sub>2</sub>]—were obtained. These coordination compounds are minor uncolored crystalline products, which were formed in a reaction mixture due to the Rad transformation in a lanthanide coordination sphere, wherein the processes of its simultaneous disproportionation, hydrolysis, and condensation proceed differently than in the absence of Ln ions. The latter fact was confirmed by the formation of the structurally characterized product of the oxazolidine nitroxide transformation during its crystallization in toluene solution. Such a conversion in the presence of 4f elements ions is unique since no similar phenomenon was observed during the synthesis of the 3<i>d</i>-metal complexes with Rad.https://www.mdpi.com/1420-3049/27/5/1626lanthanide complexesstable organic radicaltripodal ligandsoxazolidine nitroxyl radicaldisproportionationcatalytic hydrolysis |
| spellingShingle | Philippe Rey Anton I. Smolentsev Kira E. Vostrikova Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions Molecules lanthanide complexes stable organic radical tripodal ligands oxazolidine nitroxyl radical disproportionation catalytic hydrolysis |
| title | Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions |
| title_full | Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions |
| title_fullStr | Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions |
| title_full_unstemmed | Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions |
| title_short | Oxazolidine Nitroxide Transformation in a Coordination Sphere of the Ln<sup>3+</sup> Ions |
| title_sort | oxazolidine nitroxide transformation in a coordination sphere of the ln sup 3 sup ions |
| topic | lanthanide complexes stable organic radical tripodal ligands oxazolidine nitroxyl radical disproportionation catalytic hydrolysis |
| url | https://www.mdpi.com/1420-3049/27/5/1626 |
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