Review: an overview of recent developments in coordination chemistry of polypyrazolylmethylamines. Complexes with N-scorpionate ligands created in situ from pyrazole derivatives and zerovalent metals

This paper reviews the coordination chemistry of polypyrazolylmethylamines as tripodal tetradentate (L^S = N,N,N-tris(3,5-dimethylpyrazol-1-ylmethyl)amine) and dipodal tridentate (L^D = N,N,-bis(3,5-dimethylpyrazol-1-ylmethyl)amine) ligands. References to the methods for the synthesis of both the ligands alone and their transition metal complexes are given with emphasis placed on the structural features of the latter. Special attention was paid to the one-pot synthesis, which is a new method for isolation of various metal complexes with N,N-bis- and N,N,N-trispyrazolylmethylamines and co-ligands, such as urotropine and 3,5-dimethylpyrazole. The complexes in question were created in situ from 1-hydroxymethyl-3,5-dimethylpyrazole (L⁰) and zerovalent metals.