Potassium selenocyanate

Potassium selenocyanate is the inorganic compound with the formula KSeCN.  It is a hygroscopic white solid that is soluble in water, decomposing in air to red selenium and potassium cyanide.  The compound has been characterized by X-ray crystallography, which confirms that it is a salt.  The C-N and C-Se distances are 1.12 and 1.83, respectively, consistent with triple and single bonds.   

It serves as a source of Se0, e.g., in its reaction with triphenylphosphine to give triphenylphosphine selenide.

References

Category:Potassium compounds