Frontispiece: From Phosphidic to Phosphonium? Umpolung of the P4-Bonding Situation in [CpFe(CO)(L)(η1-P4)]+ Cations (L=CO or PPh3) |
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| Authors: | Dr Ian M Riddlestone Philippe Weis Dr Arthur Martens Marcel Schorpp Dr Harald Scherer Prof?Dr Ingo Krossing |
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| Institution: | Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany |
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| Abstract: | Upon coordinating P4 to electron poor cyclopentadienyl-iron cations, the average P?P bond distances shrink and the respective P4 breathing mode in the Raman spectra (600 cm?1, P4, free) is blueshifted by >40 cm?1 in CpFe(CO)(L)(η1-P4)]+ cations (L=CO or PPh3). Analysis suggests that this corresponds to an umpolung of the bonding from more phosphidic in the known, electron-rich systems to more phosphonium-like in the reported electron-poor versions. This may open new functionalization pathways for white phosphorus P4. |
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| Keywords: | cations clusters iron weakly coordinating anion (WCA) white phosphorus (P4) |
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