On the Reactivity of Zinc Hydroxide Acetate Dihydrate in Ethanol. Issue 29 (9th August 2013)

• Record Type: Journal Article
• Authors: Moezzi, Amir; Cortie, Michael B.; Shimmon, Ronald; McDonagh, Andrew M.
• Is Part Of: European journal of inorganic chemistry. Issue 29(2013)
• Page Start: 5133
• Page End: 5137
• Publication Date: 2013-08-09
• Subjects: Zinc -- Solid‐state reactions -- Zinc hydroxide acetate -- Zinc oxide -- Intercalations; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201300650
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Zinc hydroxide acetate dihydrate, Zn5 (OH)8 (CH3 CO2 )2 · 2H2 O, reacts in ethanol at room temperature to yield a mixture of zinc oxide and anhydrous zinc acetate. The process is driven by dehydration of the starting salt. Dehydration of Zn5 (OH)8 (CH3 CO2 )2 · 2H2 O also occurs when it is heated in air, but the product obtained in that case depends on the heating rate, environment and temperature. For example, when it is kept in a sealed silica capillary at 100 °C, Zn5 (OH)8 (CH3 CO2 )2 · 1.5H2 O is formed after 15 min, whereas treatment in the range 90–100 °C in an open environment results in the formation of anhydrous zinc hydroxide acetate. Heating of any of these products further causes their decomposition to Zn(CH3 CO2 )2 and ZnO. The coordination bonding mode of the acetate groups in the anhydrous layered zinc hydroxide acetate prepared by reaction with ethanol was studied by using solid‐state NMR spectroscopy. The presence of chelating, unidentate and bidentate bridging modes for the carbonyl carbon atom was revealed, but there was no evidence for the inclusion of ethanol in the resultant structure. Therefore, the reaction in ethanol offers a convenient strategy to prepare anhydrous zinc hydroxide acetate and/or zinc oxide, because it avoids the sensitivity of the thermally induced dehydroxlation process to time, temperature and environment. Abstract : Decomposition of zinc hydroxide acetate dihydrate in ethanol can be exploited to generate ZnO nanoparticles at room temperature. The mechanism involves the removal of waters of hydration and the formation of Zn5 (OH)8 (CH3 CO2 )2 followed by the generation of Zn(CH3 CO)2 and ZnO.