Question

convert S 2 butanol to R 2 butanol​

Answer 1

Answer:

CH-CH3+HBr gives CH3-CH-CH-CH3 gives R2Butanol

Answer 2

Concept Introduction:-

A sentence which has a subject, verb, object, and modifiers.

Explanation:-

A question has been provided to us

We need to find the solution to the question

$CH-CH_3+HBr$ gives $CH_3-CH-CH-CH_3$ gives $R_2$ Butanol

The conversion involves a change in configuration at $C-2$ of the butanol. In other words a bimolecular nucleophilic displacement $(SN_2)$ is needed. SH- would be an effective nucleophile. This can be prepared by bubbling $H_2S$ into sodium hydroxide solution in water/ethanol. BUT one cannot do a direct displacement of an OH group of an alcohol. This means that we must make the alcohol into a better leaving group. To do this we could react the $2$-butanol with p-toluenesulphonyl chloride in pyridine as a solvent, isolate the tosylate ester, and then treat with SH- in water ethanol.

Final Answer:-

The correct answer is $CH-CH_3+HBr$ gives $CH_3-CH-CH-CH_3$ gives $R_2$ Butanol.

#SPJ3