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Facile Synthesis of (C6F5)2BBr and (C6F5)2BX(OEt2) (X=Cl, Br) using Hydrogen Halides and Piers’ Borane


We report the facile and efficient synthesis of common electrophilic haloboranes via a protonolysis reaction between Piers’ borane, HB(C6F5)2, and H−X (X=Cl, Br). This route benefits from fast reaction times, easy setup, and minimal workup to yield the analytically pure etherates, (C6F5)2BCl(OEt2) (1) and (C6F5)2BBr(OEt2) (2), as well as the ether-free tri-coordinate species, (C6F5)2BBr (3).

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