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.