Acidodiethylenetriaminegold(III) Complexes: Preparation, Solution Chemistry, and Electronic Structure

The preparation of acidodiethylenetriaminegold (III) salts with the general formula (Au(dien)X) X2 (dien NH2C2H4NHC2H4NH2 and X Cl(-), Br(-) is reported. The complexes are acids in aqueous solution, ionizing a proton from one of the amine nitrogen atoms. The resulting con jugate bases, (Au(dien-H)X) X (dien-H) dien less one proton and X Cl(-), Br(-), were isolated. Equilibrium constants for (N-H) ionization and for the hydrolysis are given. Electronic spectra of the (Au(dien)X)(2) and (Au(dien-H)X)() complexes are assigned using a molecular orbital level classification.