Matrix infrared spectra and electronic structure calculations of the first actinideborylene: FBThF2

Abstract

Laser-ablated Th atoms react with BF₃ during condensation in excess argon at 6 K to form the first actinide borylene (FBThF₂) and actinide–boron multiple bond. Three new product absorptions in the B–F and Th–F stretching regions of matrix infrared spectra are assigned to FBThF₂ from comparison to theoretically predicted vibrational frequencies.