X hits on this document

148 views

0 shares

1 downloads

0 comments

12 / 22

N atoms inside both coordination spheres. Note that only the cationic coordination sphere contains chloro group ligands.

bonded to the Pt atom within the cationic coordination sphere have exchanged with two of the ammine groups in the anionic coordination sphere.

Linkage Isomers

Linkage isomers are coordination compounds in which the donor atom of at least one of monodentate ligands capable of bonding through two or more donor atoms is different. These ligands are referred to as ambidentate ligands

Some of these type ligands are listed below.

The standard form of the name is assigned to the linkage involving the less electronegative donor atom of the ligand. The variant form of the name is assigned to the linkage involving the more electronegative atom of the ligand.  Linkage isomers have different physical and chemical properties.

Common Ambidentate Ligands That Can Form Linkage Isomers

ligand

Lewis structure

name

donor atom

CN-

cyano

C

isocyano

N

SCN-

thiocyanato

S

isothiocyanato

N

NO2-

nitro

N

nitrito

O

= Co

= N

= H

= O

= Cl

[Co(NH3)4Cl(NO2)]+

For the tetraamminechloronitrocobalt (II) ion, the less electronegative nitrogen of the nitrous oxide ligand is bonded to the Co atom. The nitrous oxide ligand is written as "NO2" in the molecular formula with the N atom nearest to the Co symbol to indicate that the N is the donor atom and the name nitro is used when naming the coordination complex.

[Co(NH3)4Cl(ONO)]+

When the more electronegative O atom of the ambidentate  nitrous oxide ligand is bonded to the Co atom the name is changed to nitrito. The nitrous oxide ligand is written as "ONO" in the molecular formula with the O atom nearest to the Co symbol to indicate that the O atom is the donor atom.

Document info
Document views148
Page views170
Page last viewedSun Dec 04 04:29:18 UTC 2016
Pages22
Paragraphs726
Words5516

Comments