Synthesis, Crystal Structure, and Spectral Properties of Two Manganese(II) and Zinc(II) Complexes with 3,4-Dimethyl-5-(2-pyridyl)-1,2,4-triazole†

Two complexes, cis-[MnL2(NCS)2] (1) and cis-[ZnL2(NCS)2] (2) with asymmetrical substituted triazole ligands [L = 3,4-dimethyl-5-(2-pyridyl)-1,2,4-triazole], were synthesized and characterized by elemental analysis, UV/Vis and FT-IR spectroscopy as well as thermogravimetric analyses (TGA), powder XRD, and single-crystal X-ray diffraction. In the complexes, each L molecule adopts a chelating bidentate mode by the nitrogen atoms of pyridyl and triazole. Both complexes have a similar distorted octahedral [MN6] core (M = Mn2+ and Zn2+) with two NCS– ions in the cis position.