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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Chemistry »  Formation of Complexes

 Formation of Complexes

Are you new to the topic of the formation of complexes? Here is a complete description of it.

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The world of chemistry has all the chemical aspects of the universe explained by it. The atoms, ions and chemical charges continuously connect and form new ‘chemical species’. Such is the formation of complexes in chemistry. The formation of complexes elucidates the interactions of ions or metals. To understand the formation of complexes, we need to break them down in interpreting simpler terms. This includes formation, complexes in chemistry and the intermingling of these two terms.  

In the below information, we will discuss the formation of complexes. We will begin with an understanding that formation and complexes are separate. We will also branch our knowledge by knowing the importance of forming complexes. 

What Is Formation In Chemistry?

In the literal sense, formation refers to giving something a form or a shape. In the chemistry world, formation is the forming of a new chemical element with the combination of two or more chemical elements. This particular formation is broadly known as formation reaction. 

A formation reaction is a reaction where one element is formed due to chemical combinations. In this formation process, certain factors ensure that the formation takes place aptly. In formation, the temperature is one of the significant aspects. For the two or more chemical elements to give a new element, there must be the presence of an ideal temperature. 

For a formation in chemistry, the amount and the elements used also matter. The quantity of the two or more elements of information may or may not vary. Also, the elements used for the formation are chosen based on the expected element to be formed. 

For example: 

Two atoms of hydrogen and one oxygen atom make up the third element, water. Here, the quantity of the two elements used in water formation varies. Also, the electrons in the oxygen’s outer shell are retained when hydrogen electrons fuse. 

The formation is expressed through equations. Here, the equation for the above example is:

H2 + O2  → H2O (Water)

Here H2 is the two atoms of hydrogen. The stand-alone, O, is the single atom of oxygen. Both of them form the new element, that is H2O and known as water in general terms. 

What Are Complexes In Chemistry?

In chemistry, a complex refers to the substance formed by loose chemical interactions between chemical components. This interaction between chemical components is feebler than the interactions between covalent bonds. Generally, the complexes are formed with combinations of ions, atoms or neutral molecules. 

The formation of complexes involves the formation of simple and weaker chemical elements. However, this formation of complexes substantially impacts the chemical behavior of the substance formed. According to the experts, a complex is defined as a substance with a metal atom or ion as its center. Ligands then surround it. Here, ligands are the molecules or atoms that connect to the central atom and form the complex. Typical examples are pentaammine chloro cobalt, platinum nitrate and potassium ferrocyanide. 

Inorganic chemistry refers to complexes as coordination compounds. It defines coordination compounds as compounds formed with a central metal atom. All the other non-metal atoms that surround it are known as ligands. Some common examples of coordination compounds are chlorophyll, hemoglobin, vitamin B, and dyes, pigments, or catalysts. 

What Is Formation Of Complexes?

The formation of complexes is made of a central metal atom/ion surrounded by negatively charged ions or impartial molecules owning a lone pair of electrons (ligands). The formation of complexes can either possess chargeability or non-chargeability. If the formation of complexes is charged, those formed complexes are termed complexions. 

The average charge of the complex is calculated by the addition of the charge of the central metal atom or ion and ligands charges. In the formation of complexes, the ligands sacrifice their electrons and form the complex bond. In the formation of complexes, the bonding can be called a coordinated bond. The ligands have to coordinate with the central metal bond to form the complex. 

Some common examples of complexes formed with the formation are:

Hexamine Cobalt Chloride [Co(NH3)6]Cl3

Diamminedichloroplatinum [Pt(NH3)2Cl4]

Formation Of Complexes Importance

Formation of complexes has paramount significance.

  • Formation of complexes is significant in increasing the solubility of soluble salts. 
  • Formation of complexes helps in favorable interaction between electrostatic energy in chemical reactions. 
  • Formation of complexes enables the transitions of the metals. This is done by an interaction between the metal ions and ligands. 

Conclusion 

In the literal sense, formation refers to giving something a form or a shape. In the chemistry world, formation is the forming of a new chemical element with the combination of two or more chemical elements. This particular formation is broadly known as formation reaction.

In chemistry, a complex refers to the substance formed by loose chemical interactions between chemical components. This interaction between chemical components is feebler than the interactions between covalent bonds. Generally, the complexes are formed with combinations of ions, atoms or neutral molecules. 

The formation of complexes is made of a central metal atom/ion surrounded by negatively charged ions or impartial molecules owning a lone pair of electrons (ligands). The formation of complexes can either possess chargeability or non-chargeability.

faq

Frequently Asked Questions

Get answers to the most common queries related to the JEE Examination Preparation.

What is complex in chemistry?

Ans. Complex is made of a central metal atom/ion surrounded by negatively charged ions or impartial molecules owning...Read full

What is the formation of complexes in chemistry?

Ans. The formation of complexes is made of a central metal atom/ion surrounded by negatively charged ions or impartial molecules owning a lone pair...Read full

What is an example of the formation of a complex?

Ans. An example of the formation of complex is: Hexamine Cobalt Chlorid...Read full

Why is the formation of complexes important?

Ans. Formation of complexes is important because: Formation of complexes is significant in increasing the solubility of soluble salts....Read full

Ans. Complex is made of a central metal atom/ion surrounded by negatively charged ions or impartial molecules owning a lone pair of electrons (ligands).

Ans. The formation of complexes is made of a central metal atom/ion surrounded by negatively charged ions or impartial molecules owning a lone pair of electrons (ligands). The formation of complexes can either possess chargeability or non-chargeability.

Ans. An example of the formation of complex is:

Hexamine Cobalt Chloride [Co(NH3)6]Cl3

Ans. Formation of complexes is important because:

  • Formation of complexes is significant in increasing the solubility of soluble salts.
  • Formation of complexes helps in favorable interaction between electrostatic energy in chemical reactions.
  • Formation of complexes enables the transitions of the metals. This is done by an interaction between the metal ions and ligands.

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