硒氰
| 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 | 可溶于苯、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，所有数据均出自标准状态（25 ℃，100 kPa）下。 | |
硒氰是一种拟卤素，化学式为(SeCN)2。它可由硒氰酸银和碘在乙醚中反应得到，其中86%的碘会转化为碘化银：[2]
- 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；和二茂铬或二茂钒反应，分别得到(C5H5)2Cr(NCSe)(SeCN)和(C5H5)2V(NCSe)2。[5]它和CN−在乙腈中反应，生成SeCN−和Se(CN)2。[6]
参考文献
[编辑]- ^ Birckenbach, Lothar; Kellermann, Karl. Pseudo halogens. I. Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen, 1925. 58B: 786-794. ISSN: 0365-9488.
- ^ 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）.
- ^ 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）.
- ^ 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）.
- ^ 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. （原始内容存档于2018-06-12） （英语）.
- ^ 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.
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