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 : (i) `H_(3)CO^(-)` (ii) `H_(3)C-overset(O)overset(||)C-O^(-)` (vii) `CH_(3)-underset(..)overset(..)O-H`
(viii) `R- overset(..)(NH)- R`
Electrophiles : (iii) `overset(*)Cl` (iv) `Cl_(2)C:`
(v) `(H_(3)C)_(3)C^(+)`