Basicity is defined by equilibrium constant for abstracting a proton. Nucleophilicity is defined by rate of attack on an electrophilic carbon atom,
A species with a negative charge is stronger nucleophile than similar neutral species.Nucleophilicity decreases form left to right in periodic table and increases down the group in periodic table. As the size of similar type of negatively charged species increases, basicity increases and nuleophilicity decreases.
Which of the following is incorrect order of nucleophilicity?
A. `overset(Ɵ)OHgtH_(2)O`
B. `Et_(3)overset(* *)PgtEt_(2)overset(* *)S:`
C. `I^(Ɵ)gtBr^(Ɵ)gtCl^(Ɵ)gtF^(Ɵ)`
D. `Ooverset(Ɵ)Hgtoverset(Ɵ)SHgtoverset(Ɵ)SeH`
