name of the element is written.

COMPLEXES AND Nomenclature

1. The name of the center atom comes after the ligand, but the formula is reversed.

2. Oxidation number of the central atom is written in parentheses with Roman number

3. In the anionic complexes, the end of the name of the central atom ends with an atom. In cationic and neutral complexes, only the

name of the element is written.

COMPLEXES

4. There is a sequence for the name and formula of the ligands. In this order:

a- Simple anionic ligands O = (oxo); OH- (hydroxo); S = (thio); Cl- (chloro); F- (fluoro)

The anionic ligands end with -o.

b- Other inorganic anions c- Organic anions

d- Water and NH3

e- Other inorganic neutral ligands f- Neutral organic ligands

It is in the form of a sequence

COMPLEXES

5. Anionic ligands-ends with o. Neutral and

cationic ones take the name of the molecule.

Only H

O akua; NH

ammin; Carbonyl (-CO); NO is called nitrous.

6. It shows the number of ligands such as mono, di, tri, tetra, penta, hexa, which are given as prefix. More complex compounds also have prefixes such as bis, tris, tetra etc.

7. In bridged complexes, the bridge is indicated by

"".

COMPLEXES

EXAMPLES OF COMPLEX NAMES:

Ag(NH

)

 Cl Diammin silver (I) chloride

Co (NH

)

Cl

 Trichlorotriammin cobalt (III) K

Fe(CN)

 Potassium hexa cyanoferrate (II)

Zn (NH

)



Tetrammin Zinc (II)

Co (NH

)

(NO

)

 Trinitro triammin cobalt (III)

PtCl



Hexachloro platinate (IV)

NH

Cr(SCN)

(NH

)

 Amonyum tetra tiyosiyanato diammin chromate (III)

KPtCl

C

H

 Potassium trichloromonoethylene platinate (II)

COMPLEXES

K₂PtCl₆ Potassium hexa chloro palatinate (IV)

Co (H₂O)(NO^-₃)₄(NH₂ NH⁺₃) Tetra nitro aqua hydra zinium cobalt (III)

Pt(NH₃)₄ PtCl₆ Tetrammin platinum (II) hexachloroplatinate (IV)

Co (NH₃)₄ (H₂O) Cl Cl₂ Kloroakuatetrammin kobalt(III) klorür [Ni(CO)₄] Tetracarbonyl nickel (0)

[Cu (en)₂]SO₄ Bis (ethylenediamine) copper (II) sulfate [Fe(C₅H₅)₂] Bis (cyclopentadienyl) iron (II)

COMPLEXES