\input{dcf-submol2}    
\input{ce-submol2} 
\begin{center}
\begin{tikzpicture}
\node at(0,0){\chemfig{!{dcf2}}};
\node at(3.0in,0){\chemfig{!{ce2}}};
\end{tikzpicture}
\end{center}
%\chemfig{             
%          {\color{red}C}
%           (=[:45]O)
%           (-[:180,6]!{dcf2})
%   -[:-90]!{ce2}
%}