H3O iupac name 

             ••        
H-------O+ ------H
            |
            H 
Hydronium ion

K4[Fe(CN)6] IUPAC NAME



Potassium hexacyanoferrate (II)


IUPAC name, chemistry photo, K4[Fe(CN)6] IUPAC NAME, coordination compound

K4[Fe(CN)6] IUPAC NAME




IUPAC NAME


What is K4[Fe(CN)6] ? 


In 1752, the French chemist Pierre Joseph Macquer (1718–1784) first reported the preparation of potassium ferrocyanide, which he achieved by reacting Prussian blue (iron(III) ferrocyanide) with potassium carbonate.[4][5]
Modern production Edit

K4[Fe(CN)6] IUPAC NAME, IUPAC name, coordination compound,

K4[Fe(CN)6] IUPAC NAME


Potassium ferrocyanide is produced industrially from hydrogen cyanide, ferrous chloride, and calcium hydroxide, the combination of which affords Ca2[Fe(CN)6]·11H2O. This solution is then treated with potassium salts to precipitate the mixed calcium-potassium salt CaK2[Fe(CN)6], which in turn is treated with potassium carbonate to give the tetrapotassium salt.[6]

IUPAC NOMENCLATURE OF COORDINATION COMPOUND 

First you have to Know that what is anion and cation?

A)Cation
Whose compound are started braketes [.
Example
[CO(NH3)]CL3
[Ag(NH3)2]Cl
[Cr(en)3]Cl3
[Pt(py)4]Cl2
In above example the complexes start in braketes.
B) Anion
Whose compound are not start braketes is called anion.
For example
K4[Fe(CN)6]
Na3[Co(NO2)6]
K3[Cu(CN)4]
H2[PtCl6]
The following rules are observed in naming the coordination compound.

1) Order of naming ions

In ionic complex , poistive ion is named first folowed by negative ion .
For example
in naming complex compound ,[Co(NH3)6]Cl3,  the name of positive ion [Co(NH3)6]3+[Hexammine Cobalt (3) is written first and name of nigative ion Cl- is written afterwards. Simlerly in meaning complex compound ,K3[Al(C2O4)3] ,the name of positive ion k + ( potassium) is written first and name of nagative ion [Al(C2O4)3]3- [ tetra aluminate (3) is written afterwards . In the non ionic or moliculer complex one word name is given .
For example,
[Pt(NH3)2Cl2]
Diammine dichloro platinum (2)

2) Naming of coordination sphere

In naming complex  ions, the ligands (coordination groups) are named first. If the ligands have simple names, their number is indicated by the free prefixes di, tri ,tetra etc.If the legends have complicated names (ethylen ediamine en) , pyredine (py), ) ,their number is indicated by the prefix bis ,Tris ,tetrakis etc and names of such ligands are written in the four  braket .
3) Naming of ligands
In complex compound, central metal ion is attached with negative , natural or positive ligands .
a) If the ligand is anion (negatively charged) it is named as ending in 'O'.
 For example,
I) (CO3-)2-     CARBONATO
(SO3)2-  SULPHITO
CH3COO-ACETATO
NO2- NITRO
ONO-NITRO
NO3- NITRATO
Cl- CHLORO
Br-  BROMO
I-  IODO
OH-  HYDROXO
O2-  OXO
(O2-)2-  PEROXO
O2- SUPEROXO
CN -  CYANO
(SO4)2- SULPHATO
(S2O3)2-  THIOSULPHATO
SCN-  THIO CYANATO
NCS- ISOTHIOCYANOTO
NH2- AMIDO
NH2- IMIDO
N3-  AJIDO
(C2O4)2- OXALATO

4) ORDER OF NAMING LIGANDS

 If two are more types of ligands are present according to modern IUPAC system they are written in the alphabetical order irrespective of whether they are negative natural.
For example,
 in the complex compound ,[Pt(NH3)4(Cl)(NO2)]Cl
The order of element is an amine chloro nitro.

5) Naming of bridging groups

in the polynuclear complexes,( the complexes having two or more metal atoms) ,the bridging group is indicated by separating it from rest of the complex by hyphens and by adding μ  before its name the Greek letter μ  is indicated before the name of each bridging groups.

5) Name of oxidation state of central metal ion

After indicating the number and names of legends, the next step is to mention the name of central metal ion followed by roman number Sach as II,III,IV  to indicate the oxidation state of the metal. If the complex ion is a cation , the central metal ion is named as hexammine chomium (III) ion .
If the complex ion is anion ,
The name of central metal ion is made to end 'ate' . Thus ,[ Ni(CN)4]2- is as tetra cyno nikelate (II) ion.