I've spent literally all day trying to figure out how to make this work and I'm completely stuck. I'm trying to make something similar to
from this site
and I cannot for the life of me get the bonds between the two rings right. I can get the one on the right okay, but I can't get the one on the left. Furthermore, I can't figure out how to change the "distant bond" lengths so I can offset the back ring correctly so it's all visible. Here is an example of what I have (with the non-essential branches commented out so I could see what the heck is going on). The back ring is only scaled larger so I could see what it was doing. It is ignoring the ?[ringStart]
connection in the back ring because it's the 6th bond in a ring of 5. No idea how to massage it to do this and any help would be appreciated.
\documentclass{article}
\usepackage{chemfig}
\begin{document}
\setcrambond{2pt}{}{}
\chemfig{[:18]*5(
(-N?[ringStart](-O_2N))
-[,,,,line width=2pt](>N?[ringEnd](-NO_2))
-[,,,,line width=2pt]%N(-NO_2)
-[,,,,line width=2pt]?[ringTop]
-[,,,,line width=2pt]%N(-O_2N)
-[,,,,line width=2pt])
*5([::36,2.0]-?[ringEnd,1]-N--N-?[ringStart,2])}
\end{document}
And once the connections are correct, I have no idea how to force the offset to create the perspective either.