Potassium selenocyanate

Potassium selenocyanate
Identifiers
CAS Number
  • 3425-46-5
3D model (JSmol)
  • Interactive image
ChemSpider
  • 69409
ECHA InfoCard 100.020.292 Edit this at Wikidata
EC Number
  • 222-320-1
PubChem CID
  • 76960
CompTox Dashboard (EPA)
  • DTXSID0063020 Edit this at Wikidata
InChI
  • InChI=1S/CHNSe.K/c2-1-3;/h3H;/q;+1/p-1
    Key: KYEKHFSRAXRJBR-UHFFFAOYSA-M
  • C(#N)[Se-].[K+]
Properties
Chemical formula
 CNKSe
Molar mass 144.08
Appearance colorless or white solid
Density 2.35 g/cm3
Solubility in water
 high
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound

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 112 and 183 pm, respectively consistent with triple and single bonds.[1]

Synthesis and reactions

Potassium selenocyanate is produced by the reaction of molten potassium cyanide with elemental selenium.[2]

Organic selenocyanates are often prepared by treatment of potassium selenocyanate with alkyl halides or aryl diazonium salts.[2]

Potassium selenocyanate serves as a source of Se0, e.g., in its reaction with triphenylphosphine to give triphenylphosphine selenide.[3]

References

  1. ^ Swank, Duane D.; Willett, Roger D. (1965). "The Crystal Structure of Potassium Selenocyanate". Inorganic Chemistry. 4: 499–501. doi:10.1021/ic50026a013.
  2. ^ a b E. Bulka (1977). "Selenocyanates and Related Compounds". In Saul Patai (ed.). Cyanates and Their Thio Derivatives: Part 2, Volume 2. PATAI'S Chemistry of Functional Groups. p. 619-818. doi:10.1002/9780470771532.ch3.
  3. ^ Nicpon, Philip; Meek, Devon W. (1967). "Triphenylphosphine Selenide". Inorganic Syntheses. 10: 157–159. doi:10.1002/9780470132418.ch23.
  • v
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Salts and covalent derivatives of the cyanide ion
HCN He
LiCN Be(CN)2 B(CN)3 C(CN)4
C2(CN)2 		NH4CN
ONCN
O2NCN
N3CN 		OCN−
-NCO
O(CN)2 		FCN Ne
NaCN Mg(CN)2 Al(CN)3 Si(CN)4
(CH3)3SiCN 		P(CN)3 SCN−
-NCS
(SCN)2
S(CN)2 		ClCN Ar
KCN Ca(CN)2 Sc(CN)3 Ti V Cr(CN)63− Mn Fe(CN)2
Fe(CN)64−
Fe(CN)63− 		Co(CN)2
Co(CN)3−
5 		Ni(CN)2
Ni(CN)42−
Ni(CN)44− 		CuCN Zn(CN)2 Ga(CN)3 Ge(CN)2
Ge(CN)4 		As(CN)3
(CH3)2AsCN
(C6H5)2AsCN 		SeCN−
(SeCN)2
Se(CN)2 		BrCN Kr
RbCN Sr(CN)2 Y(CN)3 Zr Nb Mo(CN)84− Tc Ru Rh Pd(CN)2 AgCN Cd(CN)2 In(CN)3 Sn(CN)2 Sb(CN)3 Te(CN)2
Te(CN)4 		ICN Xe
CsCN Ba(CN)2 * Lu(CN)3 Hf Ta W(CN)84− Re Os Ir Pt(CN)42-
Pt(CN)64-
 AuCN
Au(CN)2- 		Hg2(CN)2
Hg(CN)2 		TlCN Pb(CN)2 Bi(CN)3 Po At Rn
Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La(CN)3 Ce(CN)3
Ce(CN)4 		Pr(CN)3 Nd Pm Sm(CN)3 Eu(CN)3 Gd(CN)3 Tb Dy(CN)3 Ho(CN)3 Er Tm Yb(CN)3
** Ac(CN)3 Th(CN)4 Pa UO2(CN)2 Np Pu Am Cm Bk Cf Es Fm Md No