Copper(II) Acetate

[142-71-2] C4H6CuO4 (MW 181.64) InChI = 1/2C2H4O2.Cu/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2/f2C2H3O2.Cu/q2*-1;m/rC4H6CuO4/c1-3(6)8-5-9-4(2)7/h1-2H3 InChIKey = OPQARKPSCNTWTJ-JKWRXBNBCI (oxidizes carbanions,2 radicals3 and hydrocarbons;4 for oxidative coupling and solvolytic cleavage of SiC,5 BiC, PbC, and SbC bonds; rapid radical scavenger; catalyst for cyclopropanation of alkenes with diazo esters;6 Lewis acid catalyst) Alternate Name: cupric acetate. Physical Data: blue crystals, mp 130–140 °C (dec); d 1.92–1.94 g cm−3.7 Solubility: soluble in H2O (6.79 g/100 mL, 25 °C); soluble in AcOH, pyridine; insoluble in ether. Form Supplied in: widely available; the anhydrous salt can be prepared from the usually available monohydrate Cu(OAc)2·H2O [6046-93-1] by heating to 90 °C until constant weight7, 8 or by refluxing Cu(OAc)2·H2O in acetic anhydride and washing the insoluble product with Et2O.9 Analysis of Reagent Purity: iodometric titration;10 atomic absorption spectroscopy.11 Purity: recrystallize (as monohydrate) from warm dil HOAc.57 Handling, Storage, and Precautions: must be stored in the absence of moisture; is decomposed on heating to hydrogen and CuIOAc.7 Irritating to skin, eyes, and respiratory system. May be dissolved in a combustible solvent for incineration.