\begin{table}%t7
\caption{\label{tab:CH2DCN} Quantum numbers of rotational transitions of 
CH$_2$DCN from present work, frequencies (MHz), uncertainties unc. (kHz), and 
residuals o$-$c (kHz) between observed frequencies and those calculated from 
the final set of spectroscopic parameters.} 
\par
%\centerline
{
\small\begin{tabular}{  cc rr | cr rr }
\hline \hline
$J', K_a', K_c' {-} J'', K_a'', K_c''^a$ & Frequency & \multicolumn{1}{c}{unc.} & o$-$c & 
$J', K_a', K_c' {-} J'', K_a'', K_c''^a$ & Frequency & \multicolumn{1}{c}{unc.} & o$-$c \\
\hline
 16,  5, d$-$15,  5, d  &  277717.406    &  15 &     1 & 52,  2, 50$-$51,  2, 49 &  903537.321 & 100 &    79 \\
 16,  4, d$-$15,  4, d  &  277761.128    &   8 &     0 & 52,  1, 51$-$51,  1, 50 &  904004.487 & 200 &$-$106 \\
 16,  1, 15$-$15,  1, 14 &  279000.540    &   8 &  $-$4 & 53,  1, 53$-$52,  1, 52 &  913688.193 & 200 &$-$117 \\
 18, 10, d$-$17, 10, d  &  312026.460    &  30 & $-$33 & 53,  5, d$-$52,  5, d  &  918213.532 & 200 &   244 \\
 18,  9, d$-$17,  9, d  &  312124.485    &  25 &  $-$1 & 53,  2, 51$-$52,  2, 50 &  920897.991 & 200 &$-$104 \\
 18,  8, d$-$17,  8, d  &  312212.301    &  20 & $-$22 & 53,  1, 52$-$52,  1, 51 &  921264.278 & 200 & $-$12 \\
 19,  1, 19$-$18,  1, 18 &  328415.596    &  20 &  $-$4 & 57,  0, 57$-$56,  0, 56 &  983638.923 & 200 &   221 \\
 19, 10, d$-$18, 10, d  &  329351.951    &  30 &  $-$5 & 57,  7, d$-$56,  7, d  &  986718.597 & 200 & $-$83 \\
 19,  3, 17$-$18,  3, 16 &  329864.188    &  20 &  $-$3 & 57,  6, d$-$56,  6, d  &  986958.857 & 100 &    25 \\
 19,  2, 17$-$18,  2, 16 &  330013.795    &  10 &     2 & 57,  5, d$-$56,  5, d  &  987192.298 & 100 &$-$104 \\
 28,  2, 26$-$27,  2, 25 &  486412.193    &  50 & $-$14 & 57,  3, 54$-$56,  3, 53 &  988062.351 & 150 &    64 \\
 28,  6, d$-$27,  6, d  &  485722.367    &  50 &    55 & 57,  1, 56$-$56,  1, 55 &  990226.073 & 150 &$-$131 \\
 28,  5, d$-$27,  5, d  &  485817.005    &  50 &    17 & 59,  0, 59$-$58,  0, 58 & 1017787.045 & 100 & $-$42 \\
 28,  2, 27$-$27,  2, 26 &  485869.754    &  50 &    29 & 59,  3, 56$-$58,  3, 55 & 1022618.283 & 200 &   305 \\
 28,  4, d$-$27,  4, d  &  485902.358    &  50 &     2 & 59,  2, 57$-$58,  2, 56 & 1024977.054 & 200 &   138 \\
 28,  3, 26$-$27,  3, 25 &  485983.562    &  50 & $-$53 & 60,  1, 60$-$59,  1, 59 & 1033530.934 & 200 & $-$76 \\
 28,  3, 25$-$27,  3, 24 &  485997.103    &  50 &    86 & 60,  2, 59$-$59,  2, 58 & 1038125.138 & 200 &   458 \\
 28,  8, d$-$27,  8, d  &  485492.763    &  50 &    21 & 60,  1, 59$-$59,  1, 58 & 1041862.576 & 200 &   330 \\
 28,  7, d$-$27,  7, d  &  485614.775    &  50 &    69 & 60,  2, 58$-$59,  2, 57 & 1042306.148 & 250 &$-$269 \\
 28, 10, d$-$27, 10, d  &  485203.300    & 120 & $-$60 & 63,  1, 63$-$62,  1, 62 & 1084807.020 & 150 & $-$95 \\
 28,  9, d$-$27,  9, d  &  485355.715    & 120 & $-$32 & 63,  0, 63$-$62,  0, 62 & 1086011.334 & 100 & $-$55 \\
 28,  1, 27$-$27,  1, 26 &  487942.201    &  80 &     8 & 63, 10, d$-$62, 10, d  & 1089039.445 & 200 &   160 \\
 29,  4, d$-$28,  4, d  &  503235.929    &  50 &     4 & 63,  9, d$-$62,  9, d  & 1089381.592 & 150 &$-$123 \\
 29,  3, 27$-$28,  3, 26 &  503321.438    & 100 &  $-$2 & 63,  2, 62$-$62,  2, 61 & 1089618.582 &  80 &    11 \\
 29,  3, 26$-$28,  3, 25 &  503337.368    & 100 & $-$40 & 63,  8, d$-$62,  8, d  & 1089695.853 & 200 &   177 \\
 29,  2, 27$-$28,  2, 26 &  503793.683    &  50 & $-$15 & 63,  7, d$-$62,  7, d  & 1089985.064 &  80 &    29 \\
 30,  8, d$-$29,  8, d  &  520124.625    &  80 &     0 & 63,  6, d$-$62,  6, d  & 1090257.213 &  80 & $-$35 \\
 30,  6, d$-$29,  6, d  &  520371.360    & 100 & $-$16 & 63,  5, d$-$62,  5, d  & 1090528.555 & 100 &     1 \\
 30,  3, 28$-$29,  3, 27 &  520657.371    & 100 &   155 & 63,  4, 60$-$62,  4, 59 & 1090822.850 &  80 & $-$22 \\
 30,  3, 27$-$29,  3, 26 &  520676.142    & 100 &    14 & 63,  4, 59$-$62,  4, 58 & 1090859.365 & 120 & $-$65 \\
 30,  2, 28$-$29,  2, 27 &  521175.868    & 100 & $-$24 & 63,  3, 60$-$62,  3, 59 & 1091699.685 &  80 &    31 \\
 31,  1, 31$-$30,  1, 30 &  535476.485    & 100 &    21 & 63,  1, 62$-$62,  1, 61 & 1093420.205 &  80 &    13 \\
 36,  1, 36$-$ 35,  1, 35 &  621614.941    &  30 & $-$32 & 64, 10, d$-$63, 10, d  & 1106217.421 & 200 & $-$65 \\
 36, 11, d$-$35, 11, d  &  623372.367    & 100 &    24 & 64,  7, d$-$63,  7, d  & 1107179.127 &  80 &    44 \\
 36,  0, 36$-$35,  0, 35 &  623466.170    &  70 & $-$63 & 64,  1, 63$-$63,  1, 62 & 1110587.991 & 120 & $-$91 \\
 36, 10, d$-$35, 10, d  &  623587.841    &  50 & $-$40 & 64,  2, 62$-$63,  2, 61 & 1111566.310 & 200 &   175 \\
 36,  9, d$-$35,  9, d  &  623783.719    & 100 & $-$30 & 65,  1, 65$-$64,  1, 64 & 1118961.766 & 200 &   224 \\
 36,  7, d$-$35,  7, d  &  624118.615    &  50 &    30 & 65,  0, 65$-$64,  0, 64 & 1120088.060 & 200 &$-$151 \\
 36,  6, d$-$35,  6, d  &  624259.658    &  70 & $-$55 & 65,  8, d$-$64,  8, d  & 1124068.425 & 200 &   150 \\
 36,  2, 35$-$35,  2, 34 &  624357.951    &  50 &    81 & 65,  6, d$-$64,  6, d  & 1124651.425 & 200 &    25 \\
 36,  5, d$-$35,  5, d  &  624386.762    &  70 & $-$54 & 65,  4, 62$-$64,  4, 61 & 1125246.197 & 150 &    32 \\
 36,  3, 33$-$35,  3, 32 &  624671.021    &  50 &    56 & 65,  3, 62$-$64,  3, 61 & 1126225.423 & 200 &   210 \\
 36,  2, 34$-$35,  2, 33 &  625480.300    &  40 & $-$32 & 65,  1, 64$-$64,  1, 63 & 1127746.725 & 100 &    50 \\
 37,  1, 37$-$36,  1, 36 &  638831.212    &  30 & $-$51 & 65,  2, 63$-$64,  2, 62 & 1128865.300 & 120 &    71 \\
 37, 11, d$-$36, 11, d  &  640652.376    & 100 & $-$27 & 66,  4, 63$-$65,  4, 62 & 1142450.318 & 100 &$-$121 \\
 37, 10, d$-$36, 10, d  &  640873.836    &  70 & $-$23 & 66,  4, 62$-$65,  4, 61 & 1142500.850 & 100 &    70 \\
 37,  9, d$-$36,  9, d  &  641075.115    &  50 & $-$46 & 66,  3, 64$-$65,  3, 63 & 1142588.221 & 120 &    13 \\
 37,  8, d$-$36,  8, d  &  641256.800    &  50 &     4 & 66,  1, 65 $-$ 65,  1, 64 & 1144895.808 & 200 & $-$15 \\
 37,  5, d$-$36,  5, d  &  641696.453    &  20 &     3 & 66,  2, 64$-$65,  2, 63 & 1146157.487 &  50 & $-$17 \\
 37,  3, 34$-$36,  3, 33 &  641996.762    &  50 & $-$64 & 67,  1, 67$-$66,  1, 66 & 1153091.574 & 200 & $-$94 \\
 37,  1, 36$-$36,  1, 35 &  644319.793    &  40 & $-$22 & 67, 10, d$-$66, 10, d  & 1157721.118 & 200 &    25 \\
 51,  1, 51$-$50,  1, 50 &  879398.852    & 150 & $-$74 & 67,  7, d$-$66,  7, d  & 1158730.616 & 200 &   138 \\
 51,  6, d$-$50,  6, d  &  883499.518    & 100 &$-$149 & 68,  1, 68$-$67,  1, 67 & 1170147.296 & 150 &$-$169 \\
 51,  5, d$-$ 50,  5, d  &  883699.093    & 100 &    25 & 68,  0, 68$-$67,  0, 67 & 1171160.249 &  80 &    98 \\
 51,  3, 49$-$50,  3, 48 &  884076.317    & 150 &$-$113 & 68,  8, d$-$67,  8, d  & 1175587.939 & 200 &$-$178 \\\hline 
 51,  2, 49$-$50,  2, 48 &  886173.147    & 200 &   119 & 68,  6, d$-$67,  6, d  & 1176204.005 & 200 &$-$226 \\
 52,  1, 52$-$51,  1, 51 &  896546.406    & 150 &   179 & 68,  1, 67$-$67,  1, 66 & 1179165.037 & 200 &$-$191 \\
 52,  0, 52 $-$ 51,  0, 51 &  898157.427    & 150 &    45 & 69,  1, 69$-$68,  1, 68 & 1187196.902 & 200 &$-$100 \\
 52,  2, 51$-$51,  2, 50 &  ~900538.159$^b$& 150 &  $-$1 & 69,  0, 69$-$68,  0, 68 & 1188172.743 & 200 &    74 \\
 52,  7, d$-$51,  7, d  &  ~900538.159$^b$& 150 &  $-$1 & 69,  1, 68$-$68,  1, 67 & 1196285.083 & 200 &$-$134 \\
\hline  
\end{tabular}}
\medskip
\par
$^a$ A ``d'' given for $K_c$ signals that the asymmetry doubling has not been resolved for the respective $K_a$.
The uncertainty and the residual refer to the average. Since $J - K_a - K_c = 0$ or 1, $K_c$ is redundant in such case.\\
$^b$ Blended lines treated as intensity weighted average in the fit. 
\end{table}