\begin{table}%t1
%\centering
\par
  \caption{Calculated$^a$ spectroscopic constants for the low-lying $v_9=1$, $v_{10}=1$,
             and $v_{11}=1$ singly excited bending states of HC$_5$N.\label{tab:abinitio}}
$$
  \begin{tabular}{ccD{.}{.}{3}D{.}{.}{3}D{.}{.}{3}}
    \hline\hline  \\[-1ex]%[-3ex]
                &               & \multicolumn{1}{c}{$v_{11}=1$} &
                                  \multicolumn{1}{c}{$v_{10}=1$} &
                                  \multicolumn{1}{c}{$v_9=1$} \\[1ex]
    \hline  \\[-1ex]%[-3ex]
    $\omega$    &  (cm$^{-1}$)  & 106.8    & 254.0    & 462.9    \\%[-1ex]
    $\alpha$    &  (MHz)        &  -2.705  &  -2.453  &  -1.594  \\%[-1ex]
    $q_t$       &  (MHz)        &   1.125  &   0.490  &   0.320  \\%[-1ex]
    $q_{tJ}$    &  (Hz)         &  -0.993  &  -0.176  &  -0.032  \\%[1ex]
    \hline 
  \end{tabular}
  $$
  \begin{list}{}{}
    \item[$^a$] CCSD(T)/cc-pVQZ. Standard 2${\rm nd}$ order perturbation theory in normal coordinate
                      space is employed in the calculation of $\alpha$, $q_t$ and $q_{tJ}$ values.
  \end{list}
  \end{table}