硝酸四氨合金是一种配合物,化学式为[Au(NH3)4](NO3)3。
制备
将氨水(约3mol/L)缓慢滴加至饱和硝酸铵的HAuCl4·3H2O冷溶液(30g/L)中,至pH为4.8时结束。无色晶体沉淀用冰水洗涤,真空干燥得到产物。[2]
需要注意的是,氨水如果滴加太快,会产生爆炸性的黄色固体雷酸金。[3]
结构
硝酸四氨合金由平面正方形的[Au(NH3)4]3+和阴离子NO3-构成,阳离子中Au—N的键长为2.02Å。[1]
用途
硝酸四氨合金可以用于制备碳负载的金催化剂。[4]
参考文献
- ^ 1.0 1.1 Weishaupt, Martin; Strähle, Joachim. Kristallstruktur und Schwingungsspektrum des Tetrammingold(III) -nitrats.: Crystal Structure and Vibrational Spectrum of Tetraamminegold(III)-Nitrate. Zeitschrift für Naturforschung B. 1976-05-01, 31 (5): 554–557. ISSN 1865-7117. doi:10.1515/znb-1976-0505.
- ^ Michel Manfait, Alain J.P. Alix, Charles Kappenstein. Raman and infrared studies of the square planar tetraammine gold(III) nitrate and its deuterate. Inorganica Chimica Acta, 1981. 50: 147–152
- ^ 余建民. 贵金属化合物及配合物合成手册. 北京:化学工业出版社, 2009. pp 62. ISBN 978-7-122-03271-3
- ^ Pyryaev, P. A.; Moroz, B. L.; Zyuzin, D. A.; Nartova, A. V.; Bukhtiyarov, V. I. Nanosized Au/C catalyst obtained from a tetraamminegold(III) precursor: Synthesis, characterization, and catalytic activity in low-temperature CO oxidation. Kinetics and Catalysis. 2010, 51 (6): 885–892. ISSN 0023-1584. doi:10.1134/S0023158410060145.
拓展阅读
- Broennum, Birthe; Johansen, H. Saaby; Skibsted, L. H. Ammine ligand exchange in tetraamminegold(III) in aqueous solution. Composition of transition states and relative reactivity of tetraamminegold(III) and its conjugated base, amidotriamminegold(III). Inorganic Chemistry. 1988, 27 (11): 1859–1862. ISSN 0020-1669. doi:10.1021/ic00284a010.