کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1324035 | 1499922 | 2012 | 5 صفحه PDF | دانلود رایگان |
It has been shown that the coordination of a tertiary phosphine to the π-allyl imine–amide complex of nickel(II) affects the nickel oxidation state and leads to the irreversible elimination of the allyl group in the form of a cyclodimerization product. The coordination of PMe3 to allyl imine–amide complex 1 brings about the formation of phosphine allyl imine–amide complex of nickel(II) 3. In solution it spontaneously disproportionates giving nickel(I) complex 4 and cyclohexene. The isolated nickel complexes are X-ray amorphous, so they have been thoroughly studied with EPR and 2D-NMR spectroscopy.
It has been shown that during the coordination of a tertiary phosphine the π-allyl imine–amide complex of nickel(II) undergoes significant transformations such as the change in the nickel oxidation state and irreversible elimination of the allyl group in the form of a cyclodimerization product.Figure optionsDownload as PowerPoint slideHighlights
► Stable π-allyl complex.
► Coordination of PMe3.
► Transition of π-allyl complex to σ-allyl complex of Ni+2.
► Spontaneous transition of Ni+2 complex to Ni+1 one.
► Ni+1 is the final form of nickel in the system.
Journal: Journal of Organometallic Chemistry - Volume 715, 15 September 2012, Pages 43–47