Answer
64.8k+ views
Hint: To answer this question we must have the knowledge of electron pair acceptor and donor molecules. Any element will accept electrons if its octet is incomplete and the one with excess of electron will lose electrons.
Complete step by step solution:
Let us study the given pair of species,
Ammonia is a well known base to us, ammonia has one nitrogen atom as a central atom and 3 hydrogen atoms are bound to it via a single bong and the geometry is trigonal bipyramidal. Since the atomic number of nitrogen is 7 and it has 5 electrons in its valence shell, but it is bonded to only 3 hydrogen atoms. So it has one lone pair left, which nitrogen can donate and hence ammonia is an electron donor.
While talking about boron trifluoride, boron is the central atom and 4 fluorine atoms are attached to it. Boron belongs to the group 13 element; its atomic number is 5 and is attached with 3 fluorine atoms. So no extra electrons are left with boron, even after bonding with fluorine its valence shell only contains 6 electrons, 3 of its own and 3 via bonding. Hence, it is an electron deficient species and can accept electrons
So the above example is a perfect example of an electron donor-acceptor pair.
Note: The ammonia and boron trifluoride cannot be isomers because to be isomers they must have the same molecular formula. The allotropes are the different forms of the same elements. Ammonia is a base and boron trifluoride is an alkali-acid pair not acid-alkali pair.
Complete step by step solution:
Let us study the given pair of species,
Ammonia is a well known base to us, ammonia has one nitrogen atom as a central atom and 3 hydrogen atoms are bound to it via a single bong and the geometry is trigonal bipyramidal. Since the atomic number of nitrogen is 7 and it has 5 electrons in its valence shell, but it is bonded to only 3 hydrogen atoms. So it has one lone pair left, which nitrogen can donate and hence ammonia is an electron donor.
While talking about boron trifluoride, boron is the central atom and 4 fluorine atoms are attached to it. Boron belongs to the group 13 element; its atomic number is 5 and is attached with 3 fluorine atoms. So no extra electrons are left with boron, even after bonding with fluorine its valence shell only contains 6 electrons, 3 of its own and 3 via bonding. Hence, it is an electron deficient species and can accept electrons
So the above example is a perfect example of an electron donor-acceptor pair.
Note: The ammonia and boron trifluoride cannot be isomers because to be isomers they must have the same molecular formula. The allotropes are the different forms of the same elements. Ammonia is a base and boron trifluoride is an alkali-acid pair not acid-alkali pair.
Recently Updated Pages
Write a composition in approximately 450 500 words class 10 english JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Arrange the sentences P Q R between S1 and S5 such class 10 english JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
What is the common property of the oxides CONO and class 10 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
What happens when dilute hydrochloric acid is added class 10 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
If four points A63B 35C4 2 and Dx3x are given in such class 10 maths JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
The area of square inscribed in a circle of diameter class 10 maths JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Other Pages
Electric field due to uniformly charged sphere class 12 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Excluding stoppages the speed of a bus is 54 kmph and class 11 maths JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
In the ground state an element has 13 electrons in class 11 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
A boat takes 2 hours to go 8 km and come back to a class 11 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
According to classical free electron theory A There class 11 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)