Propene to propan 2 ol

Name the reagents used in the following reactions: (i) Oxidation of a primary alcohol to carboxylic acid. (ii) Oxidation of a primary alcohol to aldehyde. (iii) Bromination of phenol to 2,4,6-tribromophenol. (iv) Benzyl alcohol to benzoic acid. (v) Dehydration of propan-2-ol to propene. (vi) Butan-2-one to butan-2-ol.

Match the column I with column II and mark the appropriate choice. Column I Column II (A) Hydrolysis of benzene diazonium chloride (i) p- Cresol (B) Phenol + methyl chloride in presence of an, A l C l 3 ​ (ii) Salicylic acid (C) Reaction of sodium phenoxide with C O 2 ​ (iii) Picric acid (D) Phenol + Conc. H N O 3 ​ (iv) Phenol

dehydration of propan-2-ol to give propene THE DEHYDRATION OF PROPAN-2-OL This page looks at the mechanism for the acid catalysed dehydration of propan-2-ol. The dehydration of propan-2-ol is taken as a simple example of the way that secondary and tertiary alcohols dehydrate. Note: If you aren't sure about the different kinds of alcohols (primary, secondary and tertiary) have a quick look at the Primary alcohols like ethanol use a different mechanism, and ethanol is discussed separately on another page. You will find a link to this from the elimination mechanisms menu. You will also find a link there to a page on the dehydration of more complicated alcohols where more than one product may be formed. The dehydration of propan-2-ol The facts Propan-2-ol can be dehydrated to give propene by heating it with an excess of concentrated sulphuric acid at about 170°C. Concentrated phosphoric(V) acid, H 3PO 4, can be used instead. The acids aren't written into the equation because they serve as catalysts. If you like, you could write, for example, "conc H 2SO 4" over the top of the arrow. Notice that the -OH group is lost, together with a hydrogen from a next-door carbon - it doesn't matter which one. If you chose the other one, you would get CH 3CH=CH 2. That's the same molecule flipped over. Note: There are many side reactions which go on at the same time. These aren't required by any current A' level syllabus. The mechanism - the full version We are going to discuss the mechanism...