Categorise the following molecules/ions ad nucleophile or electrophile.
(1) `HS^(Ө)`
(2) `BF_3`
(3) `C_2H_5O^(Ө)`
(4) `(CH_3)_3 ddot N`
(5) `C1^(Ө)`
(6) `CH_3 - overset (oplus) C = O`
(7) `:overset (Ө) NH_2`
(8) `overset (oplus) N O_2`.

Explanation

Nucleophiles:` HS^(-)0 ,C_(2) H_(5) O^(-),(CH_(3))_(3)N,H_(2)N `
These species have unshared pair of electrons, which can be donated and shared with an electrophile.
Electrophiles: `BF_(3),Coverset(+)l,CH_(3)-overset(+)C=O,overset(+)NO_(2)`.
Reactive sites have only six valence electrons, can accept electron pair from a nucleophile.