New Pyrazole- and Benzimidazole-derived Ligand Systems

Abstract

A series of N-containing heterocyclic compounds have been synthesized using approaches such as the well-known Knorr synthesis, and a facile N-alkylation method. This series of compounds includes pyrazole derivatives, tris(2-benzimidazolylmethyl)amine derivatives, and “pincer” ligands. Characterization methods include 1H NMR, FT-IR, CHN analyses, UV-vis spectroscopy, and fluorimetry, while X-ray crystal structures are reported for most of the compounds. The crystallographic results affirm a 13C NMR method for isomer assignment of substituted pyrazoles.