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

The acetonitrile Ag complex [Ag(CF)(NCCH)] (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(CF)Cl] (3⋅) or [Ag(CF)] (1) via halide abstraction using AgNO 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(CF)(CHN)] (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⋅ leads to the Ag-ONO anion 5 instead of 2, as evidenced by NMR spectroscopy, EA and Sc-XRD.