THE GROUND AND 1ST TORSIONAL STATES OF ACETALDEHYDE

We have fitted to within experimental accuracy a data set for acetaldehyde consisting of 423 vt = 0 microwave lines, 270 vt = 1 microwave lines, and 214 vt = 1 ← 0 far-infrared lines, using a global model from the earlier literature. The vt = 1 microwave data set was extended and corrected by 76 new measurements from NIST; the theoretical model was extended by inclusion of higher order terms from the literature. The final fit requires only 34 parameters to achieve a unitless weighted standard deviation for the whole fit of 1.15, demonstrating both the power of the model and the internal consistency of the data. © 1992.