Table 2
Measured frequencies and residuals (νobs − νcalc) in MHz for the rotational transitions of 1,2-diethynylbenzene.
 |
νobs | νobs − νcalc |
|---|---|---|
| 21,2–11,1 | 3718.0808 | 0.0082 |
| 20,2–10,1 | 4036.5597 | 0.0035 |
| 21,1–11,0 | 4771.1493 | 0.0098 |
| 31,3–21,2 | 5464.9715 | 0.0021 |
| 32,2–22,1 | 6366.9270 | 0.0179 |
| 31,2–21,1 | 6988.1538 | −0.0062 |
| 32,1–22,0 | 7047.7281 | −0.0014 |
| 41,4–31,3 | 7137.2432 | 0.0024 |
| 40,4–30,з | 7234.7818 | 0.0101 |
| 42,3–32,2 | 8321.0133 | 0.0126 |
| 51,5–41,4 | 8763.9657 | −0.0065 |
| 50,5–40,4 | 8797.2933 | 0.0047 |
| 41,3–31,2 | 8946.2760 | 0.0079 |
| 43,1–33,0 | 9085.2485 | 0.0254 |
| 42,2–32,1 | 9562.8878 | −0.0070 |
| 52,4–42,3 | 10155.5724 | −0.0046 |
| 61,6–51,5 | 10 370.0747 | −0.0058 |
| 60,6–50,5 | 10 380.0387 | −0.0021 |
| 51,4–41,3 | 10 602.2929 | 0.0044 |
| 53,3–43,2 | 10 933.8954 | 0.0132 |
| 53,2–43,1 | 11 725.7060 | −0.0168 |
| 52,3–42,2 | 11 877.3150 | −0.0207 |
| 62,5–52,4 | 11 884.2907 | −0.0088 |
| 71,7–61,6 | 11 968.7362 | −0.0038 |
| 70,7–60,6 | 11 971.4924 | −0.0038 |
Notes. The standard asymmetric-top notation, 
, where J is the total rotational angular-momentum quantum number and Ka, Kc represent the quantum numbers for the projection of the angular momentum onto the symmetry axis (a- or c-axis) in the two limiting cases of prolate and oblate symmetric tops, respectively, is used to denote the rotational levels involved in each transition.
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