查看“︁四氰合汞(II)酸钾”︁的源代码

{{Chembox
| Name = 四氰合汞(II)酸钾
| NameEn = Potassium tetracyanomercurate(II)
| ImageFile = Potassium tetracyanomercurate(II).png
|  ImageSize = 
|  ImageAlt = 
| IUPACName = 
| IUPACNameZh = 
| OtherNames = 
| Section1 = {{Chembox Identifiers
|   CASNo = 591-89-9
|   CASNo_Ref = {{cascite|correct|CAS}}
|   PubChem = 
|   SMILES =  [K+].[K+].N#C[Hg-2](C#N)(C#N)C#N
|   ChemSpider = 11097}}
| Section2 = {{Chembox Properties
|   Formula = K<sub>2</sub>Hg(CN)<sub>4</sub>
|   MolarMass = 382.86
|   Appearance = 无色晶体
|   Density = 2.420 g·cm<sup>−3</sup>
|   MeltingPt = 
|   BoilingPt = {{convert|400|C|K}}（分解）<ref>{{cite journal|journal=Journal of thermal analysis|volume=32|issue=3|language=en|issn=0022-5215|date=1987-05|pages=927–937|doi=10.1007/BF01913779|url=http://link.springer.com/10.1007/BF01913779|title=Thermal analysis of some cyano compounds|accessdate=2020-08-24|author=D. De Marco, A. Marchese, P. Migliardo, A. Bellomo}}</ref>
|   SolubleOthers = 2.85 g（乙醇）}}
| Section4 = {{Chembox Related
|  OtherAnions = [[锌氰酸钾|K<sub>2</sub>[Zn(CN)<sub>4</sub>]]]、K<sub>2</sub>[Cd(CN)<sub>4</sub>]<br>K<sub>2</sub>[Hg(SCN)<sub>4</sub>]
|  OtherCations = 
|  OtherCpds = [[氰化汞|Hg(CN)<sub>2</sub>]]}}
}}

'''四氰合汞(II)酸钾'''是一种[[配位化合物]]，化学式为K<sub>2</sub>[Hg(CN)<sub>4</sub>]。它是无色晶体，可溶于水。

==制备==
四氰合汞(II)酸钾可由[[氰化钾]]和[[氰化汞]]反应得到：<ref>{{книга
 | автор         = Georg Brauer
 | заглавие      = Handbook of Preparative Inorganic Chemistry
 | ссылка        = https://books.google.com.ua/books?id=Pef47TK5NfkC&pg=PA1122&lpg=PA1122&dq=%22K2Hg(CN)4%22+Mercury&source=bl&ots=W7KEheCeZI&sig=ETcIbA-y5ghZfHXnvd-IXCqASkQ&hl=ru&sa=X&ved=0CC8Q6AEwA2oVChMIuoPcrfXsxwIVgZ5yCh0uFQpx#v=onepage&q=%22K2Hg(CN)4%22%20Mercury&f=false
 | место         = 
 | издательство  = Elsevier
 | год           = 2012 
 | том           = 2
 | страниц       = 882
 | страницы      = 
 | isbn          = 9780323161299
 | ref           = 
}}</ref>:
:<math>\mathsf{ Hg(CN)_2 + 2 KCN \ \xrightarrow{}\ K_2[Hg(CN)_4] }</math>

==性质==
四氰合汞(II)酸钾属[[立方晶系]]，空间群''Fd''{{overline|3}}''m''，晶胞参数a=1.276 nm，Z=8。

它可溶于水和乙醇。

它和[[三甲基镓]]在95 °C反应，得到K[Ga(CH<sub>3</sub>)<sub>2</sub>(CN)<sub>2</sub>]和[[二甲基汞|(CH<sub>3</sub>)<sub>2</sub>Hg]]。<ref>Ehemann, T.; Dehnicke, K. Preparation of potassium dicyanodimethylgallate(I){{de}}. ''Journal of Organometallic Chemistry'', 1974. 64 (3): C33-C35. ISSN: 0022-328X.</ref>

==参考文献==
{{reflist}}

[[Category:钾化合物]]
[[Category:二价汞化合物]]
[[Category:汞配合物]]
[[Category:氰配合物]]