A variable-temperature study of 1,2-bis(dimethylamino)-1,2-bis(2,6-dimethylanilino)diborane

The title compound, C₂₀H₃₂B₂N₄, is monoclinic at ambient temperature but triclinic (pseudo-monoclinic) below 150 K. The structures of the two phases, determined at 200 and 120 K, respectively, are very similar, the molecular symmetry being crystallographic C₂ and approximate (local) C₂, respectively. There is significant π conjugation within each N—B—N moiety, but none between them or between the N—B—N and arene moieties.