Progress in Polyarsolyl Chemistry |
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| Authors: | Dr Claudia Heindl Dr Eugenia V Peresypkina Dr Alexander V Virovets Dr Gábor Balázs Prof?Dr Manfred Scheer |
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| Institution: | 1. Institut für Anorganische Chemie, Universit?t Regensburg, Regensburg, Germany;2. Nikolaev Institute of Inorganic Chemistry, Siberian Division of RAS, Novosibirsk, Russia;3. Novosibirsk State University, Novosibirsk, Russia |
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| Abstract: | The synthesis of heteroatom analogues of the cyclopentadienyl anion Cp? is a fascinating and challenging field of research. The replacement of methine moieties by phosphorus is well investigated for the synthesis of mono‐, tri‐ and pentaphospholyl ligands. On the other hand, arsenic derivatives are rare and 1,2,4‐triarsolyl and tetraarsolyl salts are unknown. Herein, we report on the synthesis of CsE3C2(trip)2] ( 1 a : E=P; 1 b : E=As; trip=2,4,6‐triisopropylphenyl) and CsE4C(trip)] ( 2 a : E=P; 2 b : E=As). Compound 1 b represents the first 1,2,4‐triarsolyl and 2 b the first tetraarsolyl anion. All salts are obtained in one‐pot syntheses using E(SiMe3)3, 2,4,6‐triisopropylbenzoyl chloride and CsF. The products 1 a ?2 C4H8O2, 2 a ?Et2O and 2 b ?3 C4H8O2 were characterized by X‐ray structural analysis, which revealed planar heterocycles. Nucleus‐independent chemical shifts (NICS) confirmed the aromaticity of these anions. Notably, compound 2 a ?Et2O is only the second tetraphospholyl ligand which is structurally characterized. |
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| Keywords: | cyclopentadienyl ligands heterocycles inorganic ring systems polyarsolyl polyphospholyl |
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