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Investigation of nitro–nitrito photoisomerization: crystal structures of trans-bis(acetylacetonato-O,O′)(pyridine/4-methylpyridine/3-hydroxypridine)nitrocobalt(III)
The reaction cavities of the nitro groups in the title compounds, trans-bis(acetylacetonato-κ(2) O,O′)(nitro)(pyridine-κN)cobalt(III), [Co(C(5)H(7)O(2))(2)(NO(2))(C(5)H(5)N)], (I), trans-bis(acetylacetonato-κ(2) O,O′)(4-methylpyridine-κN)(nitro)cobalt(III), [Co(C(5)H(7)O(2))(2)(NO(2))(C(6)H(7)N...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6218901/ https://www.ncbi.nlm.nih.gov/pubmed/30443397 http://dx.doi.org/10.1107/S2056989018014731 |
Sumario: | The reaction cavities of the nitro groups in the title compounds, trans-bis(acetylacetonato-κ(2) O,O′)(nitro)(pyridine-κN)cobalt(III), [Co(C(5)H(7)O(2))(2)(NO(2))(C(5)H(5)N)], (I), trans-bis(acetylacetonato-κ(2) O,O′)(4-methylpyridine-κN)(nitro)cobalt(III), [Co(C(5)H(7)O(2))(2)(NO(2))(C(6)H(7)N)], (II), and trans-bis(acetylacetonato-κ(2) O,O′)(3-hydroxypyridine-κN)(nitro)cobalt(III) monohydrate, [Co(C(5)H(7)O(2))(2)(NO(2))(C(5)H(5)NO)]·H(2)O, (III), have been investigated to reveal that bifurcated intermolecular C(py)—H⋯O,O contacts in (III) are unfeasible for the nitro–nitrito photochemical linkage isomerization process. In each structure, the pyridine ring and the Co atom lie on a crystallographic mirror plane; in (I) and (II) the nitro group lies in the same plane, whereas in (III), which crystallizes as a monohydrate, the nitro group is disordered over three orientations in a 0.672 (16):0.164 (8):0.164 (8) ratio; the water molecule of crystallization is statistically disordered over two sites adjacent to the mirror plane. In the crystals of (I) and (II), the molecules are linked into [100] chains by C—H⋯O hydrogen bonds, whereas the extended structure of (III) features (010) layers linked by O—H⋯O and C—H⋯O hydrogen bonds. Compounds (I) and (II) were refined as inversion twins. |
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