Regioselective Insertion of Aluminum(I) in the cyclo‐P5 Ring of Pentaphosphaferrocene |
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Authors: | Ravi Yadav,Thomas Simler,Bhupendra Goswami,Christoph Schoo,Ralf K ppe,Subhayan Dey,Peter W. Roesky |
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Affiliation: | Ravi Yadav,Thomas Simler,Bhupendra Goswami,Christoph Schoo,Ralf Köppe,Subhayan Dey,Peter W. Roesky |
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Abstract: | A route to directly access mixed Al–Fe polyphosphide complexes was developed. The reactivity of pentaphosphaferrocene, [Cp*Fe(η5‐P5)] (Cp*=C5Me5), with two different low‐valent aluminum compounds was investigated. The steric and electronic environment around the [AlI] centre are found to be crucial for the formation of the resulting Al–Fe polyphosphides. Reaction with the sterically demanding [Dipp‐BDIAlI] (Dipp‐BDI={[2,6‐iPr2C6H3NCMe]2CH}?) resulted in the first Al‐based neutral triple‐decker type polyphosphide complex. For [(Cp*AlI)4], an unprecedented regioselective insertion of three [Cp*AlIII]2+ moieties into two adjacent P?P bonds of the cyclo‐P5 ring of [Cp*Fe(η5‐P5)] was observed. The regioselectivity of the insertion reaction could be rationalized by isolating an analogue of the reaction intermediate stabilized by a strong σ‐donor carbene. |
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Keywords: | aluminum ferrocene polyphosphides regioselectivity triple-decker |
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