Answer
Verified
439.5k+ views
Hint: Conformational isomerism is a kind of stereoisomerism. In confirmation isomerism, the isomers can be inter-convertible by rotations about single bonds. Among the different conformations, Gauche conformation has less steric strain when compared to eclipsed conformation. Less strain means low internal energy and high stability.
Complete step by step solution:
- We have to find how many gauche conformations are possible by n-butane.
- n-butane contains 4 carbon atoms.
- The below representations are called Newman’s conformations of n-butane.
- By rotating one of the carbon atoms by keeping another carbon fixed we will get different conformations of n-butane.
- The following are the possible conformations of n-butane by rotating one of the carbon by keeping another carbon atom fixed.
- There are a total of 6 confirmations possible for n-butane.
- Out of those 6, three confirmations are Eclipsed (I, III and V), two confirmations are gauche (II and VI), and one anti conformation (IV).
- Gauche conformation has less strain when compared to eclipsed conformation.
- In eclipsed conformation, the atoms are going to face high repulsion because of the overlapping of one atom with another.
- In n-butane, there are two gauche conformations with less strain.
- Therefore the number of gauche conformations possible for n-butane is 2.
So, the correct option is A.
Note: In Gauche conformation the two atoms or groups have a dihedral angle of more than 0 and less than 120. A conformation in a molecule has one or more gauche connections then it can be called as gauche conformation and gauche conformations are stable than eclipsed conformations.
Complete step by step solution:
- We have to find how many gauche conformations are possible by n-butane.
- n-butane contains 4 carbon atoms.
- The below representations are called Newman’s conformations of n-butane.
- By rotating one of the carbon atoms by keeping another carbon fixed we will get different conformations of n-butane.
- The following are the possible conformations of n-butane by rotating one of the carbon by keeping another carbon atom fixed.
- There are a total of 6 confirmations possible for n-butane.
- Out of those 6, three confirmations are Eclipsed (I, III and V), two confirmations are gauche (II and VI), and one anti conformation (IV).
- Gauche conformation has less strain when compared to eclipsed conformation.
- In eclipsed conformation, the atoms are going to face high repulsion because of the overlapping of one atom with another.
- In n-butane, there are two gauche conformations with less strain.
- Therefore the number of gauche conformations possible for n-butane is 2.
So, the correct option is A.
Note: In Gauche conformation the two atoms or groups have a dihedral angle of more than 0 and less than 120. A conformation in a molecule has one or more gauche connections then it can be called as gauche conformation and gauche conformations are stable than eclipsed conformations.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE