Crystal structure of bis(diisopropylamino)fluoroborane

The predominantly planar structure of a fluoro-substituted bis­(di­alkyl­amino)­borane, C12H28BFN2, was obtained from the reaction of boron trifluoride diethyl etherate with lithium diiso­propyl­amide and its structure is presented here. While the B—F bond length is in the typical range of single B—F bonds, the B—N bond length indicates a partial double-bond character. The sterically demanding isopropyl groups on both amides increase the N—B—N angle and enable inter­molecular van der Waals inter­actions.