Containing Pyrazole-Type Ligands

Ovejero, P., Mayoral, M.J., Cano, M. and Lagunas, M.C. (2007) Luminescence of neutral and ionic gold(l) complexes containing pyrazole or pyrazolate-type ligands. Journal of Organometallic Chemistry, 692, 1690-1697. 

Trofimenko reviewed his work on poly(pyrazolyl)borate chemistry and pyrazole-derived ligands in 197157 and 19 72.58 In the 1972 contribution Tpx ligands were contained as a separate category. In 198659 Trofimenko reported a summary on the coordination chemistry of poly(pyrazolyl)borates. Its review in 19932 covers the 1984-1993 period and contains the systematic abbreviation system that we employed in this book and which could be adapted to most types of substitution on the Tp ligand, greatly facilitating writing chemical formulas for Tpx complexes. Shaver also commented the Tpx... 

Sorrell and co-workers have studied the properties of dinuclear copper complex 1 which contains pyrazole ligands (DMP = 3,5-dimethylpyrazolyl). This complex is not able to catalyze oxidation reactions as found in our laboratory. To further study the reactivity of these types of catalysts we synthesized the copper complexes 2 and 3. ... 

A rich coordination chemistry of aromatic diazine (N-N), especially pyridazine and phthalazine related ligands has emerged over the last three decades,1-72 and recently open-chain diazine (N-N) coordination chemistry has been well developed, especially by Thompson and others.62-113 Many types of aromatic heterocyclic compounds contain a 1,2-diazine (N-N) moiety, e.g., pyridazine and its 3,6-disubstituted derivatives (Scheme 1, Type 1), phthalazine, condensed phthalazines and their substituted derivatives (Scheme 1, Type 2), and other compounds such as pyrazole, triazole, thiadiazole, tetrazole, indazole, 1,2,4-triazine, 1,2,4,5-tetrazine, and thiadiazepines. Alternatively, the 1,2-diazine (N-N) moiety also exists as an open-chain entity in some related compounds, e.g., A-substituted-amide hydrazonimidates (Scheme 1, Type 3), A-substituted-amide hydrazonidates (Scheme 1, Type 4), A-substituted hydrazides (Scheme 1, Type 5), A-substituted amidrazones (Scheme 1, Type 6), and A-sub-stituted hydrazidates (Scheme 1, Type 7). 

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