کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1323710 | 977301 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Inorganic and organometallic cobaloximes with dioxime containing Se side chain: Synthesis, characterization and comparison with related B12 model compounds Inorganic and organometallic cobaloximes with dioxime containing Se side chain: Synthesis, characterization and comparison with related B12 model compounds](/preview/png/1323710.png)
New series of cobaloximes, RCo(dSePhgH)2Py (R = Cl, Me, Et, n-Pr, n-Bu, Bn, 4–ClC6H4CH2) have been synthesized and characterized by NMR and elemental analysis. Molecular oxygen insertion in the benzyl complexes under photochemical conditions has been carried out and a comparison of its reaction rate with other similar cobaloximes gives the order dmestgH > dSePhgH > dpgH > dSPhgH ≥ dmgH > gH. The molecular structures of ClCo(dSePhgH)2Py, MeCo(dSePhgH)2Py, BnCo(dSePhgH)2Py, 4–ClC6H4CH2Co(dSePhgH)2Py and a dioxy complex Bn(O2)Co(dSePhgH)2Py have been determined by X-ray crystallography. The SePh groups in these complexes adopt either up-down, up-down or down-down, down-down conformations in the solid state depending upon the steric bulk and steric interactions with the axial ligand and also their orientation affects the NMR chemical shifts.
A new series of cobaloximes with bis(phenylselanyl)glyoxime as the equatorial ligand have been synthesized and characterized. The Co−C bond reactivity in benzyl cobaloximes with molecular oxygen has also been examined. The SePh groups in these complexes adopt either up-down, up-down or down-down, down-down conformations.Figure optionsDownload as PowerPoint slideHighlights
► Inorganic and organometallic cobaloximes with dioxime containing Se side chain.
► Molecular oxygen insertion in the benzyl complexes under photochemical conditions.
► The SePh groups adopt either up-down, up-down or down-down, down-down conformations.
► X-ray structures of new cobaloximes.
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 21, 15 October 2011, Pages 3343–3350