A Chelated Borinium Cation

Two coordinate boron cations are rare. Herein we report the synthesis of [RNSiMeCH]BF (R = Dipp 3, 1-Ad 5) (Dipp = CH(iPr), Ad = CH) the reaction of BF with the corresponding dilithiated diamides. Subsequent abstraction of fluoride provided the corresponding borinium salts, [(RNSiMeCH)B][B(CF)] (R = Dipp 6, 1-Ad 8). While the former was generated, the latter proved isolable and was crystallographically characterized.