Write reactions of the final alkylation product of aniline with excess of methyl iodide in the presence of sodium carbonate solution.

Explanation

`C_6 H_5 +CH_3 I to [C_6 H_5 overset(+ )(NH_2) CH_3 ]I^(-)`
` 2[C_6 H_5 overset(+ )NH_2 CH_3 ]I^(-) +Na_2 CO_3 to 2C_6 NHCH_3 CH_3 +2Nal +CO_2 +H_2 O`
`C_6 H_5 NHCH_3 underset( Na_2 CO_3) overset(CH_3 I)to C_6 H_5 N (CH_3)_2`
` C_6 H_5 N (CH_3)_2 +CH_3 I to underset("N,N,N-Trimethylanilinium iodide ")([C_6 H_5 overset(+)N (CH_3)_3 ]I^(-) underset(Na_2CO_3) overset(-2Nal)to + underset("N.N.N-Trimethylanilinium carbonate ")( [C_6 H_5 overset(+) N (CH_3)_3 ]_2 CO_(3)^(2-))`