User:冰霜葵/沙盒叄

乙酸汞
英文名	Mercury(II) acetate
别名	乙酸高汞 乙酸汞(II)盐 醋酸汞 二乙酰基氧基汞 双（乙酰氧基）汞 乙酸汞（2+）盐 二乙酸汞 mercuric acetate mercuriacetate
识别
CAS号	1600-27-7  Y
ChemSpider	14599
SMILES	[Hg+2].[O-]C(=O)C.[O-]C(=O)C
InChI	1/2C2H4O2.Hg/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
InChIKey	BRMYZIKAHFEUFJ-NUQVWONBAS
性质
化学式	C4H6O4Hg
摩尔质量	318.70 g·mol⁻¹
外观	白色晶體或粉末
密度	3.27 g/cm³，固體
熔点	179℃（分解）
溶解性（水）	25 g/100 mL（10℃）
溶解性	溶於乙醇
危险性
警示术语	R：Template:R-p
安全术语	S：Template:S-p
NFPA 704	0 3 0
致死量或浓度：
LD50（中位剂量）	76 mg/kg（大鼠經口）
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

乙酸汞，化學式 Hg(O₂CCH₃)₂ 。通常縮寫成 Hg(OAc)₂ ，this compound is employed as a reagent to generate organomercury compounds from unsaturated organic precursors.

性質

Arenes undergo "mercuration" upon treatment with Hg(OAc)₂. The one acetate group that remains on mercury can be displaced by chloride:

C₆H₅OH + Hg(OAc)₂ → C₆H₄(OH)-2-HgOAc + HOAc

C₆H₄(OH)-2-HgOAc + NaCl → C₆H₄(OH)-2-HgCl + NaOAc

The Hg²⁺ center binds to alkenes, inducing the addition of hydroxide and alkoxide. For example, treatment of methylacrylate with mercuric acetate in methanol gives an α-mercuri ester:

Hg(OAc)₂ + CH₂=CHCO₂CH₃ + CH₃OH → CH₃OCH₂CH(HgOAc)CO₂CH₃ + HOAc

Mercury(II) has a high affinity for sulfur ligands. Hg(OAc)₂ can be used as a reagent to remove the acetamidomethyl protecting group, which is used to "protect" thiol groups in organic synthesis. Similarly Hg(OAc)₂ is a standard reagent to convert thiocarbonate esters into dithiocarbonates:

(RS)₂C=S + H₂O + Hg(OAc)₂ → (RS)₂C=O + HgS + 2 HOAc

結構

Mercury(II) acetate is a crystalline solid consisting of isolated Hg(OAc)₂ molecules with Hg-O distances of 2.07 Å. Three long, weak intermolecular Hg···O bonds of about 2.75 Å are also present, resulting in a slightly distorted square pyramidal coordination geometry at Hg.