Question

In case of substituted aniline the group which decreases the basic strength is ______.

Options

• \[\ce{- OCH3}\]

• \[\ce{- CH3}\]

• \[\ce{- NH2}\]

• \[\ce{- C6H5}\]

Answer 1

In case of substituted aniline the group which decreases the basic strength is \[\underline{\ce{- C6H5}}\].

Explanation:

Electron-releasing groups enhance the electron density at the N-atom; as a result, these substituents make aromatic amines more basic. \[\ce{- OCH3, - CH3, - NH2}\] are electron releasing group whereas 4 : \[\ce{- C6H5}\] is EWG, thus decreases the basic strength.