1.

The decreasing leaving group order of the following is: i. F_(3)CSO_(3)^(o-), ii. Cl_(3)C-COO^(o-) iii. PhSO_(3)^(o-), iv. MeSO_(3)^(o-)

Answer»

`(i) GT (ii) gt (III) gt (IV)`
`(iv) gt (iii) gt (ii) gt (i)`
`(IIII) gt (i) gt (ii) gt (iv)`
`(i) gt (iii) gt (ii) gt (i)`

Solution :Nucelphilicity and LEAVING group are reversed.
Fugavity: `(i) gt (iii) gt (Iv) gt (ii)`


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