A tetradentate benzannulated P^N^N^P ligand and its Fe( ii ) complex: synthesis, characterization, and electrocatalytic hydrogen evolution

]quinoline). Starting from the monomeric P^N precursor, we show how the P^N^N^P dimer can be selectively formed and report the synthesis and characterization of an Fe(II) complex of this unique scaffold. We demonstrate the potential of such frameworks in the electrocatalytic reduction of Brønsted acids in acetonitrile solution.