\begin{table}%t7
\par
\caption{Spin-spin constant in the ground electronic state of $\textit{l}$-SiCCC and $\textit{l}$-CSiCC. 
All
values are in cm$^{-1}$.
\label{tab7}}
%\centerline
 {\begin{tabular}{c c c }
\hline \hline
& \textit{l}-SiCCC & \textit{l}-CSiCC \\
\hline 
$ \Delta$E  ($X^3 \Sigma^-$ $\rightarrow$ $ {}^1 $ $\Sigma^+$)  &
4077 &
8379 \\
$ \lambda^a $ &
--0.605 &
0.08 \\ 
& $ -0.547186^b$ & 
\\
\hline
\\
\end{tabular}}
\par
\smallskip
$^a$ Ref. \citep{39}; 
$^b$ deduced from $\mu$w measurements, Ref. \citep{21}.
\end{table}