The leaving group is that functional gro...

The leaving group is that functional group which is ejected with electrons of the o-bond in a reaction. Better the leaving group, faster is the reaction. The relative leaving abilitiy of the leaving group X in (R-X) is increased by:
i. The polarisability of (R-X) bond ii. The degree of stabilisation through solvation of X.
iii. The strength of (R-X) bond. iv. The stability of `X^(Theta)`.
The leaving group tendency is also called fugacity.
Which statement is wrong?

In polar aprotic solvents such as DMSO, DMF, and DMA, the fugacity order is `I^(Theta)gt Br^Theta gt Cl^Theta gt F^Theta`

Strong bases are good leaving groups.

The leaving group order of the following is: `OH^(Theta) gt RO^(Theta) gt CH -= C^(Theta) gt ""^ThetaNH_2`

Charged species are good leaving group than neutral species.

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The correct Answer is:

Weak bases are good leaving groups.

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The leaving group is that functional group which is ejected with electrons of the o-bond in a reaction. Bette the leaving group, faster is the reaction. The relative leaving abilitiy of the leaving group X in (R-X) is increased by: i. The polarisability of (R-X) bond ii. The degree of stabilisation through solvation of X. iii. The strength of (R-X) bond. iv. The stability of X^(Theta) . The leaving group tendency is also called fugacity. Which statement is correct?

Only `S_N1` reaction depends on the nature of leaving group.

Only `S_N2` reaction depends on the nature of leaving group.

Both `S_N1 and S_N2` reactions depend on the nature of leaving group.

All

`EtO^(Theta)` is a strong base and therefore a good leaving group.

The `-NH_2` gorup in `ArNH_2` is converted into a good leaving group by reacting it with `NaNO_2 + HCl " at " 0^@C`.

The (OH) group is converted into a good leaving group by reacting alcohols with TsCl (p-toluene sulphonyl chloride).

The amine group in `RNH_2` is converted into leaving group by reacting `RNH_2` with `NaNO_2 + HCl " at " 0^@C`.

Chlorosis

Wilting

Senescence

Necrosis