Question

Using your roadmap as a guide, show how to convert butane into 2 -butanone. Show all reagents and all molecules synthesized along the way.

Short answer

Question: Explain the step by step process of converting butane into 2-butanone. Answer: The conversion of butane into 2-butanone involves three main steps: 1. Butane is converted to 2-butanol using N-bromosuccinimide(NBS) in the presence of carbon tetrachloride (CCl4) solvent, light or heat. 2. 2-butanol is then converted to 2-bromobutane using phosphorous tribromide (PBr3). 3. Lastly, 2-bromobutane is converted to 2-butanone using silver acetate (CH3COOAg).

Step-by-step solution

Convert butane to 2-butanol

First, we need to convert butane (CH3CH2CH2CH3) into 2-butanol (CH3CH2CH(OH)CH3). This can be achieved using the following reaction: Butane + O2 + NBS --> 2-Butanol (in the presence of CCl4 solvent, light or heat) Here, NBS is N-bromosuccinimide, a brominating agent, and CCl4 is the carbon tetrachloride solvent.

Convert 2-butanol to 2-bromobutane

Next, we need to convert 2-butanol into 2-bromobutane (CH3CH2CHBrCH3). This can be done using the following reaction: 2-Butanol + PBr3 --> 2-Bromobutane + H3PO3 In this reaction, phosphorous tribromide (PBr3) is used to replace the hydroxyl group (OH) in 2-butanol with a bromine atom.

Convert 2-bromobutane to 2-butanone

Finally, we need to convert 2-bromobutane into 2-butanone (CH3CH2C(O)CH3). This can be achieved using the following reaction: 2-Bromobutane + CH3COOAg --> 2-Butanone + AgBr + CH3COOH In this reaction, silver acetate (CH3COOAg) is used to replace the bromine atom in 2-bromobutane with a carbonyl group (C=O). This results in the formation of 2-butanone, along with the byproducts silver bromide (AgBr) and acetic acid (CH3COOH). In summary, the roadmap for converting butane into 2-butanone is as follows: 1. Butane to 2-butanol using NBS in CCl4 solvent 2. 2-butanol to 2-bromobutane using PBr3 3. 2-bromobutane to 2-butanone using CH3COOAg