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Frontispiece: Hypervalent Pentafluoroethylgermanium Compounds, [(C 2 F 5 ) n GeX 5− n ] − and [(C 2 F 5 ) 3 GeF 3 ] 2− (X=F, Cl; n =2 –5)
Author(s) -
Pelzer Stefanie,
Neumann Beate,
Stammler HansGeorg,
Ignat'ev Nikolai,
Hoge Berthold
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201684662
Subject(s) - germanate , hypervalent molecule , chemistry , ion , anhydrous , lewis acids and bases , fluoride , hydrofluoric acid , inorganic chemistry , organic chemistry , reagent , catalysis
Weakly Coordinating Anions Salts with pentacoordinated germanate anions are quite rare. In their Full Paper on page 16460 ff., B. Hoge et al. present the synthesis of (bacterio‐)FAGes. For example, the fluoro(perfluoroalkyl)germanate [(C 2 F 5 ) 3 GeF 2 ] − was generated nearly quantitatively by the treatment of (C 2 F 5 ) 3 GeNEt 2 with anhydrous HF. Quantum chemical calculations of the fluoride‐ion affinity revealed (C 2 F 5 ) 3 PF 2 as a stronger Lewis acid than (C 2 F 5 ) 3 GeF. The pentafluoroethylation reaction of [(C 2 F 5 ) 3 GeF 2 ] − furnished the tetrakis(pentafluoroethyl)fluorogermanate [(C 2 F 5 ) 4 GeF] − , whereby the pentakis(pentafluoroethyl)germanate ion [Ge(C 2 F 5 ) 5 ] − was observed as a thermolabile initial product, releasing C 2 F 4 at approximately 20 °C to form the final product [(C 2 F 5 ) 4 GeF] − .