Question

which is the stronger nucleophile among Cl- and OH - in polar aprotic solvent​

Answer 1

In polar protic solvents (e.g. water and alcohols, any solvent with OH) nucleophilicity increases as you go down the periodic table (F- < Cl- < Br- < I – ). In polar aprotic solvents (e.g. DMSO, acetone) the order is reversed, and the most basic nucleophiles are also the most nucleophilic. (F- > Cl – > Br – > I – ).

Answer 2

Answer:

OH- is the stronger nucleophile among Cl- and OH - in polar aprotic solvent​.

Explanation:

Although aprotic solvents contain hydrogen atoms, they are not directly linked to O or N (lack O-H or N-H bonds) and hence are unable to form hydrogen bonds.

OH- is the stronger nucleophile among Cl- and OH - in polar aprotic solvent​ Because of its tiny size in aprotic solvents, OH- is a better nucleophile. In protic solvents, where H bonding inhibits nucleophile activity, the situation may be inverted. The anion of halogens, the halide ions, operate as nucleophiles or bases, not the halogens themselves.

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