Improved syntheses, and structural and electronic characterization of carboxamide-substituted Tp^CONHPh,Me and Tp^CONHt-Bu,Me ligands

Improved syntheses and electronic characterization of carboxamide-substituted tris(pyrazol­yl)borate ligands are reported. Their Tl^I salts and the Cu^I carbonyl complexes have been prepared and are compared with alkyl-substituted tris(pyrazolyl)borate ligands.

A tris­(pyrazol-1-yl)methane bearing carb­oxy­lic acid groups at position 4: {1-[bis­(4-carb­oxy-3,5-dimethyl-1H-pyrazol-1-yl)meth­yl]-3,5-dimethyl-1H-pyrazole-4-carboxyl­ato}sodium dihydrate

A low-resolution X-ray mol­ecular study shows that the title compound displays scorpionate character, and resolves apparent ambiguities between solution and solid-state NMR spectroscopies.

(N,N-Di­ethyl­dithio­carbamato)[tris­(3,5-di­methyl­pyrazol-1-yl)hydro­borato]copper(II): a new copper(II) di­thio­carbamate compound with the classic Tp^Me₂ scorpionate

This new complex using the classic Tp^Me₂ scorpionate, (Tp^Me₂)Cu(S₂CNEt₂), is relevant to blue copper protein models and to Cu extraction from waste treatment and mine-tailing leachate. The IR and UV-Vis spectra are consistent with the crystal structure.