explain SiCl4 and SnCl4 can function as Lewis acid
Answers
Anish❤️
sicl4 and sncl4 are acts as a lewis acids because it has vacant d orbitals. but ccl4 has no vacant d orbitals. this is the reason for ccl4 not act as the lewis acid❤️
The SiCl₄ and SnCl₄ can function as Lewis acid
Explanation:
We know that , on the basis of chemical nature the substances are either :
- Acids
- Bases
- Neutral
There are many concepts proposed in order to define acids , bases like :
- Arrhenius concept of acids
- Bronsted -Lowry concept
- Lewis concept
Lewis concept
According to him:
Lewis Acids: They are those which accept a pair of electron.
For example: substances that falls in this category:
• Cations like ammonium ion etc
• All neutral electron deficient compounds like BF₃, AlCl₃ etc
• All those which have empty d orbital like SF₄,SiCl₄,SnCl₄ etc
• All those different elements with different electro-negativities but bonded with multiple bonds like carbon dioxide etc.
Lewis Bases:
They are those that are electron donors.
They are of two types:
• Anions like chloride ions etc
• All neutral species having lone pair of electrons like water etc
Limitation of this concept: There are many substances which are Lewis bases and acids, but they may not be Arrhenius acid or base or Lowry acid or base.