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Compare the basicity of the following compounds: f) Urea derivatives: 1-phenylurea (phenyl group associated with urea). 1,3-diphenylurea (two phenyl groups associated with urea).
Accepted Answer
The basicity of urea derivatives is influenced by the electron-donating or electron-withdrawing nature of the substituents attached to the urea molecule. Phenyl groups are electron-donating groups due to resonance effects. Therefore:
1. 1-Phenylurea has a slightly higher basicity compared to urea because the phenyl group donates electron density to the nitrogen atoms in the urea molecule, increasing their electron density and making them more basic.
2. 1,3-Diphenylurea has an even higher basicity than 1-Phenylurea. This is because the presence of two phenyl groups increases the electron density on the nitrogen atoms, making them more basic.
In summary, the basicity of urea derivatives increases with the number of phenyl groups attached to the urea molecule.
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