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使用者:冰霜葵/沙盒叄

維基百科，自由的百科全書
乙酸汞
英文名 Mercury(II) acetate
別名 乙酸高汞
乙酸汞(II)鹽
醋酸汞
二乙醯基氧基汞
雙（乙醯氧基）汞
乙酸汞（2+）鹽
二乙酸汞
mercuric acetate
mercuriacetate
識別
CAS號 1600-27-7  checkY
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
性質
化學式 C4H6O4Hg
莫耳質量 318.70 g·mol⁻¹
外觀 白色晶體或粉末[1]
密度 3.27 g/cm³，固體
熔點 179℃（分解）
溶解性（水） 25 g/100 mL（10℃）
溶解性 溶於乙醇
危險性
警示術語 R：Template:R-p
安全術語 S：Template:S-p
NFPA 704
0
3
0
 
致死量或濃度：
LD50（中位劑量）
 76 mg/kg（大鼠經口）
若非註明，所有數據均出自標準狀態（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:[2]

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:[3]

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.[4]

Ball-and-stick model of part of the crystal structure of mercury(II) acetate Space-filling model of part of the crystal structure of mercury(II) acetate

參考文獻

  1. ^ （簡體中文）化工詞典 乙酸汞
  2. ^ Whitmore, F. C.; Hanson, E. R. "o-Chloromercuriphenol" Organic Syntheses, Collected Volume 1, p.161 (1941).http://www.orgsyn.org/orgsyn/orgsyn/prepContent.asp?prep=CV1P0161
  3. ^ Carter, H. E.; West, H. D. 「dl-Serine」 Organic Syntheses, Collected Volume 3, p.774 (1955). http://www.orgsyn.org/orgsyn/orgsyn/prepContent.asp?prep=CV3P0774
  4. ^ R. Allmann. Z. Kristallogr., Kristallgeom., Kristallphys., Kristallchem. 1973, 138: 366–373.  缺少或|title=為空 (幫助)



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