Reaction of AlEt_2Cl with the diiminepyridine ligand:an unexpected product

摘要

Reaction of AlEt_2Cl with 2,6-bis(l-(2,6-diisopropylphenylimino)ethyl)pyridine offered an unexpected tricyclic complex,which was characterized by X-ray diffraction.The dimerisation reaction leading to this product has been studied by DFT calculations.This symmetry-forbidden cyclisation reaction was found to follow a biradical pathway with an unusual low energy barrier.