Synthesis, infrared spectra and thermal investigation of gold(III) and zinc(II) urea complexes. A new procedure for the synthesis of basic zinc carbonate

Reaction of urea with sodium tetrachloroaurate(III) dihydrate and zinc(II) chloride has been investigated at room and elevated temperature (∼90°C) producing three new compounds: [Au(urea)4]Cl3·2H2O, [Au2(NH2)2Cl2(NCO)(OH)]·H2O and 2ZnCO3·3Zn(OH)2. The infrared spectra were recorded and the observed bands were assigned. The binuclear gold complex and basic zinc carbonate basic were also investigated by thermal analysis, and general mechanisms describing their decompositions are suggested.