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

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H The Reaction Of Bf3 Two Equivalents Of Pyridine And Et3si Bar Where Bar B C6f5 4 A Weakly Coordinating A 1 (30.26 KiB) Viewed 13 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 ¹¹B{¹H} NMR for A shows two environments, one singlet and one triplet, whilst the ¹H NMR shows a single pyridine environment. What is A? Justify your answer. [4 marks]