A new subgroup of bis(pyrazolyl)methane ligands has been developed through the synthesis of the first N,N,N,Ntetradentate bis(pyrazolyl)methane compounds, namely, bis-(pyrazolyl)bipyridinylmethane [HC(Pz) 2 Bipy, L1] and bis(3,5methylpyrazolyl)bipyridinylmethane [HC(3,5-MePz) 2 Bipy, L2].From these ligands, a large variety of new mononuclear Fe II and Zn II complexes with counterions ranging from halides to carboxylates and sulfate were synthesised and characterised by [a]