New multidentate heteroscorpionate ligands: N-Phenyl-2,2-bis(pyrazol-1-yl)thioacetamide and ethyl 2,2-bis(pyrazol-1-yl)dithioacetate as well as their derivatives

N-phenyl-2,2-bis(pyrazol-1-yl)thioacetamide can coordinate by three different ways, as monodentate ligand by the sulfur atom, as neutral κ2-(π,N) bidentate ligand, and as tridentate monoanionic κ3-(N,N,S) chelating ligand to different metals.