NEET2007ChemistryGeneral Organic ChemistryActual
Consider the following compounds: (i) C ₆ H ₅ COCl The correct decreasing order of their reactivity towards hydrolysis is:
Options
- A(i) > (ii) > (iii) > (iv)
- B(iv) > (ii) > (i) > (iii)
- C(ii) > (iv) > (i) > (iii)
- D(ii) > (iv) > (iii) > (iv)
Correct answer
C. (ii) > (iv) > (i) > (iii)
Step-by-step solution
Electron withdrawing group increases the positive charge and electron releasing group decreases the negative change. The degree of hydrolysis increases as the magnitude of positive charge on carbonyl group increases. Among these NO ₂ & CHO are electron withdrawing group from which NO ₂ has more - I effect than-CHO. On the other hand CH ₃ is a electron releasing group. Thus, the order of reactivity towards hydrolysis is Related Theory The mesomeric effect is negative (-M) when the substituent is an electron-withdraw