Knowledge Bank

The structure of the van der Waals complex HCl $BF3$ has been determined by molecular beam electric resonance spectroscopy. The molecule is a near symmetric top with the chlorine atom 3.185 {\AA} from the boron atom and located on the $BF3$ three-fold axis. The spectroscopic constants are (B+C)/2 = 1774.378 MHz, $DJ$ = 61.6 kHz, $eqQ(13Cl)$ = -19.893 MHz, $\mu$ = 0.60 D. A structural determination will be presented.