Ацетат меди(II)

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| Name = Copper(II) acetate
| ImageFile = Copper(II) acetate anhydrous. jpg
| ImageCaption = Small crystals of copper(II) acetate
| ImageFile1 = Copper(II) acetate 3D balls2. png
| ImageCaption1 = Copper(II) acetate monohydrate
| ImageName1 = Copper(II) acetate hydrate
| IUPACName = Tetra μ2 acetatodiaquadicopper(II)
| OtherNames = Copper(II) ethanoateCupric acetateCopper acetateVerdigris
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| ExternalSDS = Baker MSDS
| NFPA H = 2
| NFPA F = 0
| NFPA R = 0
| FlashPt = Non flammable
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| GHSSignalWord = Danger
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| LD50 = 710mg/kg oral rat
| PEL = TWA 1mg/m3 (as Cu)
| REL = TWA 1mg/m3 (as Cu) Copper acetate, like all copper compounds, emits a blue green glow in a flame.

Copper acetate hydrate adopts the paddle wheel structure seen also for related Rh(II) and Cr(II) tetraacetates. One oxygen atom on each acetate is bound to one copper atom at 1.97 Å (197 pm). Completing the coordination sphere are two water ligands, with Cu–O distances of 2.20 Å (220 pm). The two copper atoms are separated by only 2.62 Å (262 pm), which is close to the Cu–Cu separation in metallic copper. The two copper centers interact resulting in a diminishing of the magnetic moment such that at temperatures below 90 K, Cu2(OAc)4(H2O)2 is essentially diamagnetic. Cu2(OAc)4(H2O)2 was a critical step in the development of modern theories for antiferromagnetic exchange coupling, which ascribe its low temperature diamagnetic behavior to cancellation of the two opposing spins on the adjacent copper atoms.

A mixture of copper acetate and ammonium chloride is used to chemically color copper with a bronze patina.

The mineral hoganite is a naturally occurring form of copper(II) acetate. A related mineral, also containing calcium, is paceite.