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 H2 O → H2 SeO3 + 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Ph3 P(SeCN)2 [ 4] ;和二羰基二茂钛反应,羰基被取代,得到(C5 H5 )2 Ti(NCSe)2 ;和二茂铬 或二茂钒 反应,分别得到(C5 H5 )2 Cr(NCSe)(SeCN)和(C5 H5 )2 V(NCSe)2 。[ 5] 它和CN− 在乙腈 中反应,生成SeCN− 和Se(CN)2 。[ 6]
参考文献
^ 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.
Se(-II) Se(0,I) Se(I) Se(II) Se(IV) Se(VI)