h. The reaction of BF3, two equivalents of pyridine, and [Et3Si][BAr] (where [BAr+] = [B(C6F5)4], a weakly coordinating

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H The Reaction Of Bf3 Two Equivalents Of Pyridine And Et3si Bar Where Bar B C6f5 4 A Weakly Coordinating 1 (32.04 KiB) Viewed 14 times

h. The reaction of BF3, two equivalents of pyridine, and [Et3Si][BAr] (where [BAr+] = [B(C6F5)4], a weakly coordinating anion) results in the formation of a new boron-containing compound, A, whose positive mass spectrum shows a molecular ion peak at m/z=207. The 'B{'H} NMR for A shows two environments, one singlet and one triplet, whilst the 'H NMR shows a single pyridine environment. What is A? Justify your answer. [4 marks]