Provide the missing compound to the reaction scheme. Show formal charges, if applicable. See image posted below. EDIT: Does anyone use sapling and could help with a possible technical error?

Question

anonymous · Answer

So I figured out all of them except for the one labeled f). 
What did I do wrong?

aaronq · Answer

So after NaNO2, you get a diazonium salt, which can be replaced by an anion - in this case the cyanide ion. |dw:1429580886315:dw|

anonymous · Answer

Hm, that's what I'm putting in. I tried changing the orientation to see if the program would accept it, but it is still telling me it's wrong. (By the way, the dot signifies the C, so I tried connecting the N to it.)

aaronq · Answer

you're missing the triple bond between C and N

anonymous · Answer

Oh crap, you are right... 
Thanks for all the help :)