One small step for ammonia–borane: The simplest elementary aminoborane compound H₂BNH₂, which results from dehydrogenation of ammonia–borane, has been trapped by a ruthenium complex fragment leading to the isolation of a bis(σ-BH) aminoborane complex. The analogous H₂BNHMe and H₂BNMe₂ complexes were also prepared. (Picture: ruthenium complex; Ru purple, P orange, N blue, B brown, H white.)