[CuHC(Pz)2(Py)}2]Cl2·2CH3OH (C4a) and [CuHC(Pz)2(Py)}2][CuCl3H2O] (C4b) and the monofacial complex [CuCl2HC(Pz)2(Py)}]·CH3OH (C5); with the quinolinyl ligand HC(Pz)2(Qu), we obtained the bifacial complexes [CoHC(Pz)2(Qu)}2][CoCl4]·4CH3CN·0.88CH2Cl2 (C6) and [FeHC(Pz)2(Qu)}2][FeCl4]·2CH3CN (C7), the monofacial complexes [FeCl2HC(Pz)2(Qu)}] (C8) and [CuBr2HC(Pz)2(Qu)}] (C9) and the bifacial zinc complex [Zn
Additionally, the steric hindrance is easily defined in the ligands by the substitution of the pyrazole rings. By combination of the versatility in donor function and steric demand, a systematic tuning of the properties of the bis(pyrazolyl)methaneligands is possible. The synthesis and full characterization of 11 bis(pyrazolyl)methaneligands are reported. Two of these were structurally characterized