The quadridentate 'tripod'ligand-bis-(2-diphenylphosphinoethyl)-2-methoxyethylamine (NOP donor set) forms cobalt () and nickel () complexes with the general formulae [MLX] Y (X= Cl, Br, I, NCS; Y= Br, I, PF, BPh),[CoLX][CoX](X= Br, I), and CoLX (X= Cl, Br, I, NCS). The complex cations [NiLX] are low-spin with an