Synthesis and Lewis Acid Properties of Neutral Silver(III) Adducts Containing the Ag III (CF 3 ) 3 Moiety.

The acetonitrile Ag III complex [Ag III (CF 3 ) 3 (NCCH 3 )] (2) has been reported independently by Eujen and Naumann in the last century, albeit with intriguing NMR discrepancy. In their reports, 2 was claimed to be obtained starting from either [Ag III (CF 3 ) 3 Cl] - (3⋅ Cl ) or [Ag III (CF 3 ) 4 ] - (1) via halide abstraction using AgNO 3 or acidic treatment, resp. These two synthetic routes are herein reinvestigated. The feasibility of Naumann's method is demonstrated, thus providing 2 yet accompanied by its s-triazinyl derivative [Ag III (CF 3 ) 3 (C 6 H 9 N 3 )] (2'). The formation of 2' is unprecedented and was thereby investigated. Both 2 and 2' were isolated in pure fashion and fully characterized. In turn, halide extraction from 3⋅ Cl leads to the Ag III -ONO 2 anion 5 instead of 2, as evidenced by NMR spectroscopy, EA and Sc-XRD.