Hexaphosphapentaprismane: a new gateway to organophosphorus cage compound chemistry |
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Authors: | al-Ktaifani Mahmoud M Bauer Walter Bergsträsser Uwe Breit Bernhard Francis Matthew D Heinemann Frank W Hitchcock Peter B Mack Andreas Nixon John F Pritzkow Hans Regitz Manfred Zeller Matthias Zenneck Ulrich |
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Institution: | School of Chemistry, Physics and Environmental Science, University of Sussex, Brighton, BN1 9QJ, UK. |
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Abstract: | Several independent synthetic routes are described leading to the formation of a novel unsaturated tetracyclic phosphorus carbon cage compound tBu4C4P6 (1), which undergoes a light-induced valence isomerization to produce the first hexaphosphapentaprismane cage tBu4C4P6 (2). A second unsaturated isomer tBu4C4P6 (9) of 1 and the bis-W(CO)5] complex 13 of 1 are stable towards similar isomerization reactions. Another starting material for the synthesis of the hexaphosphapentaprismane cage tBu4C4P6 (2) is the trimeric mercury complex (tBu4C4P6)Hg]3 (11), which undergoes elimination of mercury to afford the title compound 2. Single-crystal X-ray structural determinations have been carried out on compounds 1, 2, 9, 11, and 13. |
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