During `SN^1` reactions, the leaving group leaves the molecule before the incoming group is attached to the molecule.

Which is the best leaving group ?

Leaving Groups || SN2

The best leaving group is : , , ,

Correct order of leaving group tendency is :

The leaving group is that functional group which is ejected with overline e^, s of the sigma -bond in a reaction. Better the leaving group, faster is the reaction. The relative leaving ability of the leaving group X in (R - X) is increased by : (i) The polarisability of (R - X) bond. (ii) The stability of X^(Ө) . (iii) The degree of stabilisation through solvation of X . (iv) The strength of (R - X) bond. The leaving group tendency is also called fugacity. Which of the following undergoes SN reaction easily ?

The leaving group is that functional group which is ejected with overline e^, s of the sigma -bond in a reaction. Better the leaving group, faster is the reaction. The relative leaving ability of the leaving group X in (R - X) is increased by : (i) The polarisability of (R - X) bond. (ii) The stability of X^(Ө) . (iii) The degree of stabilisation through solvation of X . (iv) The strength of (R - X) bond. The leaving group tendency is also called fugacity. Which of the following undergoes SN reaction easily ?