Arrange each set of compounds in order of increasing boiling points:
Both of the alkyl halides are primary. However, the substituent CH3 is at a greater distance to the carbon atom linked to Br in 1- bromo-3-methylbutane than in 1-bromo-2-methylbutane. Therefore, the approaching nucleophile is less hindered in case of the 1-bromo-3-methylbutane than in case of the 1-bromo-2-methylbutane. Hence, 1-bromo-3-methylbutane reacts faster than the latter by SN2 mechanism.
In the following pairs of halogen compounds, which compound undergoes faster SN1 reaction?
and 
Greater the stability of the carbocation, faster is the rate of SN1 reaction. Since tertiary carbocation 2-chloro-2-methylpropane is more stable than secondary carbocation 3-chloropentane. Hence SN1 reaction proceed via tertiary cation such as 2-chloro-2-methylpropane.
In the following pairs of halogen compounds, which compound undergoes faster SN1 reaction?
Greater the stability of the carbocation, faster is the rate of SN1 reaction. Since secondary carbocation 2-chloroheptane is more stable than primary carbocation 1-chlorohexane. Hence SN2 reaction proceed via secondary cation such as 2-chloroheptane.
Since D of D2O gets attached to the carbon atom to which MgBr is attached, C is isopropylmagnesium bromide
Therefore, the compound R-Br is 2- bromopropane
When an alkyl halide is trated with Na in the presence of ether, a hydrocarbon containing double bond the number of carbon atom as present in the original halide is obtained as product. This is known as Wurtz raction.
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