Work Step by Step
$CN^-$: 3 bonds, 1 atoms, b.o. =3 $OCN^-$: 4 bonds, 2 atoms, b.o. =2 $CH_3NH_2^-$: 1 bonds, 1 atom, b.o. =1 $N(CH_3)_3$: 3 bonds, 3 atoms, b.o. =1
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