Platinocyanide
# Platinocyanide

Platinocyanide, also known as tetracyanoplatinate (IUPAC), cyanoplatinate, or platinocyanate, is a polyatomic ion with the molecular formula $[Pt(CN)_4]^{2−}.$ The name also applies to compounds containing this ion, which are salts of the hypothetical platinocyanic acid (sometimes platinocyanhydric acid).

Barium platinocyanide, $Ba[Pt(CN)_4]$ is a phosphor and a scintillator. It fluoresces in the presence of x-rays and gamma rays. It was important in the discovery of X-rays, and in the development of the fluoroscope.

One platinocyanide salt, Krogmann's salt (dipotassium tetracyanoplatinate bromide trihydrate), has unusually high electric conductance.

vteSalts and covalent derivatives of the cyanide ion :

HCN

He

LiCN

$Be(CN)_2$

$B(CN)_3$

$C(CN)_4$ $C_2(CN)_2$

$NH_4CN,$ $N_3CN$

$OCN^−,$ -NCO $O(CN)_2$

FCN

Ne

NaCN

$Mg(CN)_2$

$Al(CN)_3$

$Si(CN)_4,$ $(CH_3)_3SiCN$

$P(CN)_3$

$SCN^−,$ -NCS, $(SCN)_2,$ $S(CN)_2$

ClCN

Ar

KCN

$Ca(CN)_2$

$Sc(CN)_3$

Ti

V

$Cr(CN)_6^{3−}$

Mn

$Fe(CN)_2,$ $Fe(CN)_6^{4−},$ $Fe(CN)_6^{3−}$

$Co(CN)_2$

$Ni(CN)_2$ $Ni(CN)_4^{2−}$ $Ni(CN)_4^{4−}$

CuCN

$Zn(CN)_2$

$Ga(CN)_3$

$Ge(CN)_2$ $Ge(CN)_4$

$As(CN)_3,$ $(CH_3)_2AsCN$

$SeCN^−$ $(SeCN)_2$ $Se(CN)_2$

BrCN

Kr

RbCN

$Sr(CN)_2$

$Y(CN)_3$

Zr

Nb

$Mo(CN)_8^{4−}$

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

$W(CN)_8^{4−}$

Re

Os

Ir

$Pt(CN)_4^{2-},$ $Pt(CN)_6^{4-}$

AuCN, $K[Au(CN)_2]$

$Hg_2(CN)_2,$ $Hg(CN)_2$

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

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

$UO_2(CN)_2$

Np

Pu

Am

Cm

Bk

Cf

Es

Fm

Md

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