Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation.

C₆H₅– C⁺H₂

Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation.

CH₃CH=CHCHO

Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation.

C₆H₅–CHO

Draw the resonance structures for the following compounds. Show the electron shift using curved-arrow notation.

CH₃CH= CHCH₂

What are electrophiles and nucleophiles? Explain with examples.