Question

Litmus Equation for reaction of ROH with Na: Alcohol Rxn. Order 1-butanol........... 2-butanol........... 2-methyl-2-propanol... Explanation: I fully dissolved a Not fully diwolved L 3° Not dissolved III. Reaction with Concentrated HCI Conditions/Observations Alcohol Order of Reaction 1-butanol......... 2-butanol........... 2-methyl-2-propanol. What is the equation for the reaction of each alcohol with HCI ? (2) (3) IV. Sodium Dichromate oxidation Alcohol 1-butanol........... 2-butanol.......... 2-methyl-2-propanol. Appearance/Temp Change venu dark brownblick finnad increase very dark brown black increase intam Orange wa black precipitate 134

Answer 1

Reactions with concentrated HCl:

1-butanol:

                           At room temperature, no change occurs. On heating, an oily layer is formed.

2-butanol:          One has to wait ~ 5 mins to observe the formation of an oily layer.

2-methyl-2-propanol:

                           Immediately, the solution turns turbid and an oily layer appears.

The reaction happens through S_N¹ mechanism, i.e., carbocation is an intermediate.

Since the stability of carbocation is as follows: 3⁰>2⁰>1⁰, the order of reactivity can be given as:

2-methyl-2-propanol> 2-butanol > 1-butanol