What is racemisation?

udner identical conditions, solvolysis of which of the following substrate would lead to maximum racemisation?

Nucleophilic aliphatic substitution reaction is mainly of two types: S_(N)1 and S_(N)2 . The S_(N)1 mechanism is a two step process. Reaction velocity of S_(N)1 reaction depends only on the concentration of the substrate. Since product formation takes place by the formation of carbocation, optically active substrate gives (+) and (-) forms of the product. In most of the cases the product usually consits of 5-20% inverted product and 80-95% racemised species. The more stable the carbocation, the greater is the proportion of racemisation. In solvolysis reaction, the more nucleophilic the solvent, the greater is the proportion of inversion. For the gives reaction, Which substrate will give maximum racemisation?

For the given reaction, R-underset(R_(2))underset(|)overset(R_(1))overset(|)(C )-x overset(HOH)(rarr) R-underset(R_(2))underset(|)overset(R_(1))overset(|)(C )-OH Which substrate will give maximum racemisation?

What is a couple? What is its action?

Describe briefly what do you understand by the terms racemisation and resolution?

The specific rotation of a pure enantiomer is +10^(@) . What will be its observed rotation if its is isolated from a reaction with i. 30% racemisation and 70% retention. ii. 70% racemisation and 30% inversion.

A partially racemised (+2) 2-Bromooctane on reaction with aq. NaOH in acetone gives an alcolhol with 80% inversion and 20% racemisation . Find out the rate expression of the reaction.

The specific rotation of a pure enantiomer is +16^@ . The observed rotation, if it is isolated from a reaction with 25% racemisation and 75% inversion is

What is hypertension? What are its causative factors ?