When $B_2H_6$ reacts with $(CH_3)_3N$;
$\underset{\text{Trimethyl amine}}{\ce{2(CH3)3N}}+$ $\underset{\text{Diborane}}{\ce{B2H6}}\ce{->}$ $\underset{\text{Complex}}{\ce{2(CH3)3 \overset{+}{N} \,BH3}}$
in this reaction trimethyl amine, reacts readily with diborane and form a $2(CH_3)_3\, \overset{+}{N} \,BH_3$ complex.