Characterization and Structural Insights of the Reaction Products by Direct Leaching of the Noble Metals Au, Pd and Cu with N,N′-Dimethyl-piperazine-2,3-dithione/I2 Mixtures
作者:Angela Serpe、Luca Pilia、Davide Balestri、Luciano Marchiò、Paola Deplano
DOI:10.3390/molecules26164721
日期:——
where the metals are found, respectively, in 3+, 2+ and 1+ oxidation states, and of [Cu(Me2pipdt)2]BF4 (4) and [Cu(Me2dazdt)2]I3 (5) (Me2dazdt = N,N′-dimethyl-perhydrodizepine-2,3-dithione) compared with 3. Au(III) and Pd(II) (d8 configuration) form square–planar complexes, whereas Cu(I) (d10) forms tetrahedral complexes. Density functional theory calculations performed on the cationic species of 1–5
在新型高效、安全的贵金属浸出剂的背景下,本文描述了 Me 2 pipdt/I 2混合物(其中 Me 2 pipdt = N,N'-二甲基-哌嗪-2,3-二硫酮)在浸出中的能力。有机溶液可在温和条件(室温和压力)和短时间(在报告条件下 1 小时内)定量溶解 Au、Pd 和 Cu 金属粉末。重点关注了所获得的配位化合物的结构见解,即 [AuI 2 (Me 2 pipdt)]I 3 ( 1 )、[Pd(Me 2 pipdt) 2 ]I 2 ( 2a ) 和 [Cu(Me 2 pipdt) 2 ]I 3 ( 3 ),其中金属分别处于 3+、2+ 和 1+ 氧化态,以及 [Cu(Me 2 pipdt) 2 ]BF 4 ( 4 ) 和 [Cu( Me 2 dazdt) 2 ]I 3 ( 5 ) (Me 2 dazdt = N , N '-二甲基-全氢化地氮平-2,3-二硫酮)与3相比。 Au(III)