Grade 11Organic Chemistry

What is steric hindrance. Explain with examples?

What is its effect on reaction mechanism?

deb sss saha

17 Years agoGrade 11

10 Answers

Mohini Belani

17 Years ago

The repulsions between the alkyl or any other bulky groups present on a carbon atom, if the distance between the two is less than vander waals radius is said to be steric hinderance. Steric hinderance has different effect on different types of mechanism. for eg, tertiary alkyl halides do not undergo SN2 mechanism becoz of steric hinderance.

Dhruvil Saliya

8 Years ago

suraj singh

8 Years ago

It actually means that more the no. Of alkyl group attached to carbon atom of c-x bond , presence of alkyl group increase electron density to the carbon atom, and the incoming nucleophile feel more repulsion , so it would become more difficult to react to that carbon.

Anubhav Rajoria

8 Years ago

Static hindrance is force of repilcion between the bulky molecule when the distance between them is less than vander wall force

Gurubal Birajdar

8 Years ago

In short, the bulky groups which aca t as a shield for the inner gropus do not allow nucleophile or electophile from the other compounds, creating a unstability in the structure

sexy

8 Years ago

abe saale dhruvil behnchod tep k ans deta h bakchodi marta h behan ke lode abe saale apna pada hua bhi kabhi bata liya kr

sexy

8 Years ago

where dhruvil saliya belongs to please reply soon it is a very genuine question waiting for the reply

navdeep sidhu

8 Years ago

stesic hinderence is the repulsion felt by the nucleophile when it attack on a bulky carbon , which repel the occuring of reaction

varnika

8 Years ago

The SN2 reaction requires approach of the nucleophile to the carbon bearing the leaving group the presence of bulky substituent on or near the carbon hinders the attack of nucleophile and therefore slows the reaction this interference of the bulky groups with a reaction is called Steric Hindrance

Kushagra Madhukar

5 Years ago

Dear student,

Steric hindrance at a given atom in a molecule is the congestion caused by the physical presence of the surrounding ligands, which may slow down or even prevent reactions at the atom. In short it hurdles the attack of nucleophile at that place and slow down or prevent the reaction from taking place.

for eg, tertiary alkyl halides do not undergo SN2 mechanism becoz of steric hinderance Also yield of ketol is poor due to it.

Thanks and regards,

Kushagra