1.

Which of the following compound/s on halogenation give a racemic mixture of products?

Answer»

`(CH_(3))_(4)C`
`CH_(3)CH_(2)CH_(2)CH_(3)`
`CH_(3)CH_(2)CH_(3)`
`CH_(3)CH_(3)`

Solution :Free radical substitutionn occurs by free radical mechanism. Since free radical is a planar species, THEREFORE, it can ATTACK `Cl_(2)` molecule both from above and below the PLANE giving RACEMIC MIXTURE of product. Thus, option (b) is correct.
`CH_(3)CH_(2)CH_(2)CH_(3)underset(-HCl)overset(overset(**)(C)l)to CH_(3)overset(**)(C)HCH_(2)CH_(3) overset(Cl_(2))to (+-)CH_(3)CHClCH_(2)CH_(3)`


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