硒氰酸酯是一类含有硒氰基(–SeCN)的有机化合物,其通式为RSeCN。它们通常是无色、对空气稳定的固体液体,有难闻气味。它和硫氰酸酯的结构、合成及反应相似。

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硒氰酸酯的通式,蓝色部分为硒氰基

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硒氰酸酯可由卤代烃和硒氰酸钾反应制得:[1]

RX + KSeCN → RSeCN + KX(X=Cl, Br, I)

α,ω-二卤代烃的反应类似。 卤代芳烃也可以重氮盐为原料和硒氰酸钾(或硒氰二硒氰酸硒等)反应来制备芳基硒氰酸酯:[2]

ArN2Cl + KSeCN → ArSeCN + KCl + N2

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