Nucleophiles and electrophiles are reaction intermediates having electron rich and electron deficient centres respectively . Hence, they tend to attack electron deficient and electron rich centres respectively. Classify the following species as electrophiles and uncheophiles.
(i) `H_(3)CO^(-)`
(ii) `H_(3)C-overset(O)overset(||)C-O^(-)`
(iii)Cl
(iv)`Cl_(2)C:`
(v) `(H_(3)C)_(3)C^(+)`
(vi) `Br^(-)`
(vii) `H_(3)COH`
(viii) R-NH-R

Explanation

Nucleophiles are electron-rich species . They may be neutral or negatively charge , i.e., (i)`H_3CO^-` , (ii)`H_3C-oversetoverset(O)(||)C-O^-` , (vi)`Br^-` , (vii)`H_3C-underset(ddot)overset(ddot) O-H`, (viii)`R-oversetddot(NH)-R`
Electrophiles are electron-deficient species. They may be neutral or positively charged, i.e., (iii)`oversetddot(Cl)` , (iv)`Cl_2C` : , (v)`(H_3C)_3C^+`