Coordination Compounds

2014

Submitted to:Ma’am Raheela Tariq

Submitted by:Sadia Iqbal

[COORDINATION COMPOUNDS AND THEIR APPLICATIONS]

Kinnaird College For Women Lahore

Coordination compounds and their applications
Contents: page#
1. Coordination Compounds………………………………………………3
2. Introduction……………………………………………………………...3
3. Examples………………………………………………………………...3
4. Structure…………………………………………………………………4
• Coordination number 2………………………………………………………..4
• Coordination number3…………………………………………………………4
• Coordination number4…………………………………………………………5
• Coordination number5…………………………………………………………5
• Coordination number6…………………………………………………………6
5. Application of Coordination

Introduction:
 In coordination compound ligands are Lewis bases - they contain at least one pair of electrons to donate to a metal atom/ion. Ligands are also called complexing agents.
 In coordination compounds metal atoms/ions are Lewis acids - they can accept pairs of electrons from Lewis bases.
 The atom that is directly attached to the metal atom/ion within ligand is called the donor atom.
 A coordinate covalent bond is a covalent bond in which one atom (i.e., the donor atom) shares the both electrons. This type of bonding is different from a simple covalent bond in which each atom gives one electron.
 If the coordination complex carries a net charge in compounds, the complex is called a complex ion.
Examples:
Coordination

Precipitation analysis
2. Colorimetric analysis
These approaches are called classical qualitative inorganic analysis.
• For the estimation of Ni2+ with dimethylglyoxime through the formation of [Ni(DMG)2] complex. Thus the foundation of this chelate can be used for the identification, estimation of Ni and also for its separation from Co2+ ion. [Ni(DMG)2] complex structure
• The construction of coloured complexes,such as the tetrachlorocobaltate ion,which can be exhibited spectrophotometrically by means of their light interest properties.
• The provision of complexes, such as metal acetylacetonates,which can be separated from aqueous solution by abstraction with organic solvents.
• Moreover, coordination complexes are also used as indicator in the determination of definite metal ions.
Chemo-Therapy:
The Pt complex cis-[Pt(NH3)2Cl2] known as cisplatin is used as an antitumor agent in the treatment of cancer.Ca-EDTA chelate, Ca[EDTANa2] is used in the treatment of lead poisoning, for the removal of lead from the body. Ca-EDTA structure
Electroplating:
Many complex compounds are used as electrolytes for electroplating. These compounds convey the metal ions for reduction. For example, K[Ag(CN)2] and K[Au(CN)2] are used as electrolytes for silver and gold