Question

How are $ 1-nitropropane $ and $ 2-nitropropane $ prepared from suitable oxime?

Answer 1

Hint :We know that the $ 2-nitropropane $ is a synthetic colourless liquid, flammable in nature and slightly soluble in water whereas greatly soluble in aromatic compounds like ether, hydrocarbons, esters, ketones.

Complete Step By Step Answer:
As we know that $ 1-nitropropane $ is used as starting material for the formation of other compounds especially in paint industries. $ 2-nitropropane $ is used as a solvent or additive in inks, varnishes, and polymers. It is used as a solvent and also used in pharmaceutical companies for the formation of compounds like chlorphentermine, teclozan, phentermine. Basically they have a great use in chemical industries also especially in paint based industries.
for $ 1- $ Nitropropane:
 $ \underset{Propyldoxime}{\mathop{C{{H}_{3}}C{{H}_{2}}-HC=N-OH}}\,\xrightarrow{Triflouracetic~~acid}C{{H}_{3}}C{{H}_{2}}-HC=NO-OH $ $ C{{H}_{3}}C{{H}_{2}}-HC=NO-OH\rightleftharpoons \underset{1-nitopropane}{\mathop{C{{H}_{3}}C{{H}_{2}}-{{H}_{2}}C=N{{O}^{-}}=O}}\, $
Similarly for $ 2- $ Nitropropane:
 $ \underset{Iso-Propyldoxime~~(acetoxime)}{\mathop{C{{H}_{3}}CH(C{{H}_{3}})-N=OH}}\,\xrightarrow{Triflouracetic~~acid}C{{H}_{3}}-C(C{{H}_{3}})=N({{O}^{-}})-OH $ $ C{{H}_{3}}-C(C{{H}_{3}})=N({{O}^{-}})-OH\rightleftharpoons \underset{2-nitropropane}{\mathop{C{{H}_{3}}-HC(C{{H}_{3}})-N({{O}^{-}})=O}}\, $ In the above process, acetaldoxime is oxidised in the presence of trifluoroperoxy acetic acid, nitropropane is obtained. So in the above reactions we have clearly mentioned the process by which nitropropane can be obtained from the mentioned compounds.

Additional Information:
The industrial preparation of nitropropane includes the treating of propane with nitric acid. This reaction is exothermic and it produces industrially significant nitro alkanes, nitropropane and nitropropane. Nitropropane is a colourless oil liquid which is similar to nitropropane with just a mild fruity odour. Like some other nitrated organic compounds, nitropropane is also used as a fuel additive and a precursor to rocket propellants. Nitropropane is a useful solvent for polymers such as polystyrene and is particularly useful for dissolving cyanoacrylate adhesives. Like some other nitrated organic compounds, nitropropane is also used as a fuel additive and a precursor to rocket propellants. Nitropropane is a useful solvent for polymers such as polystyrene and is particularly useful for dissolving cyanoacrylate adhesives.

Note :
Remember knowing the structure of nitropropane and the product that is asked to form, we can determine the process of its formula. The catalysts and the other conditions under which the reaction will take place should also be taken into consideration.