Synthesis and Characterization of Copper(II) Complexes of Nonfacially Coordinating Heteroscorpionate Ligands (4-Carboxyphenyl)bis(3,5-dimethylpyrazolyl)methane and (3-Carboxyphenyl)bis(3,5-dimethylpyrazolyl)methane

Complexes of Cu(II) derived from two new nonfacially coordinating heteroscorpionate ligands, (4-carboxyphenyl)bis(3,5-dimethylpyrazolyl)methane (L4c) and (3-carboxyphenyl)bis(3,5-dimethylpyrazolyl)methane (L3c), have been synthesized and characterized by X-ray diffraction, ESI-MS, IR, and UV−vis spectroscopy, electrochemistry, and magnetic susceptibility. The use of these new complexes as building blocks for the construction of supramolecular architectures is discussed.