Access to BS and BSe Double Bonds via Sulfur and Selenium Insertion into a B−H Bond and Hydrogen Migration

Stable compounds with a boron−chalcogen (S or Se) valence double bond have been prepared via sequences involving insertion of the chalcogen into a B−H bond and subsequent hydrogen migration. X-ray diffraction studies and density functional theory calculations on the resulting compounds provide convincing evidence for the boron−chalcogen multiple bonding.