硒氰

化合物

硒氰是一种拟卤素,化学式为(SeCN)2。它可由硒氰酸银乙醚中反应得到,其中86%的碘会转化为碘化银[2]

硒氰
别名 一氰化硒
二氰化二硒
识别
CAS号 27151-67-3  ✓
性质
化学式 (SeCN)2
外观 黄色晶体[1]
溶解性 可溶于三氯甲烷四氯化碳[2]
相关物质
其他阳离子 硫氰
相关化学品 硒氰酸盐
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。
2 AgSeCN + I2 ⇌ 2 AgI + (SeCN)2

它在水中按下式水解:[2]

2 (SeCN)2 + 3 H2O → H2SeO3 + 3 HSeCN + HCN

缓慢加热硒氰,它可以歧化为二氰化硒(Se(CN)2)和二硒氰酸硒(Se(SeCN)2)。[3]

它和三苯基膦反应,可以得到Ph3P(SeCN)2[4];和二羰基二茂钛反应,羰基被取代,得到(C5H5)2Ti(NCSe)2;和二茂铬二茂钒反应,分别得到(C5H5)2Cr(NCSe)(SeCN)和(C5H5)2V(NCSe)2[5]它和CN乙腈中反应,生成SeCN和Se(CN)2[6]

参考文献编辑

  1. ^ Birckenbach, Lothar; Kellermann, Karl. Pseudo halogens. I. Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen, 1925. 58B: 786-794. ISSN: 0365-9488.
  2. ^ 2.0 2.1 2.2 P. Walden, L. F. Audrieth. Free Inorganic Radicals.. Chemical Reviews. 1928-10-01, 5 (3): 339–359 [2021-01-04]. ISSN 0009-2665. doi:10.1021/cr60019a002 (英语). 
  3. ^ Colin J. Burchell, Petr Kilian, Alexandra M. Z. Slawin, J. Derek Woollins, Karla Tersago, Christian Van Alsenoy, Frank Blockhuys. E 2 (CN) 2 (E = S, Se) and Related Compounds. Inorganic Chemistry. 2006-01, 45 (2): 710–716 [2021-01-04]. ISSN 0020-1669. doi:10.1021/ic0515103 (英语). 
  4. ^ Y. Tamura, M. Adachi, T. Kawasaki, Y. Kita. Selenocyanation using a combined reagent of triphenylphosphine and selenocyanogen. A new and simple synthesis of alkyl selenocyanates and symmetrical alkyl diselenides from alcohols. Tetrahedron Letters. 1979-01, 20 (24): 2251–2252 [2021-01-04]. doi:10.1016/S0040-4039(01)93689-5 (英语). 
  5. ^ M. Morán, V. Fernández. Synthesis and characterization of mixed cyanothiocyanate and cyanoselenocyanate complexes of bis(cyclopentadienyl)-titanium, -vanadium and -chromium. Journal of Organometallic Chemistry. 1979-01, 165 (2): 215–223 [2021-01-04]. doi:10.1016/S0022-328X(00)94323-7 (英语). 
  6. ^ Austad, Tor. Reaction between dithio- or selenocyanide and the cyanide ion in acetonitrile. Study of the mechanism using ionic carbon-​13 labeled cyanide. Acta Chemica Scandinavica, Series A: Physical and Inorganic Chemistry, 1974. 28 (7): 806-808. ISSN: 0302-4377.