Strong metal-to-ligand π-backbonding weakens the NN bond in 2-pyridinealdazine coordinated to tetraammine-ruthenium(II)

A new tetraammineruthenium(II) complex coordinated to 2-pyridinealdazine displays considerable π-backbonding from dπ(Ru) orbitals to π*(2-PCA) orbitals centered in the imine group.87