The Second Torsional State of Acetaldehyde

✍ Scribed by S.P. Belov; M.Y. Tretyakov; I. Kleiner; J.T. Hougen

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 737 KB
• Volume: 160
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1157

✦ Synopsis

We have fit to within experimental accuracy a data set for acetaldehyde obtained by combining (1014 v_{t}=0.840 v_{t}=1), and (430 v_{t}=2) microwave lines with (420 v_{t}=1 \leftarrow 0) and (404 v_{t}=2 \leftarrow) 1 far-infrared lines. The principal additions to the previously treated (v_{t}=0) and (v_{t}=1) microwave data set consist of about 250 new measurements from Barclay. Anderson, and Ziurys and 900 new measurements from Nizhny Novgorod; the (v_{t}=2) measurements include about 400 lines from Nizhny Novgorod and a few lines from various other sources. The previously treated (v_{t}=) (1-0) far-infrared data set was extended by adding about 200 high- (J) lines from the (1-0) fundamental band and 400 lines from the (2 \leftarrow 1) hot band. all taken from a previously reported Fourier transform spectrum. The final fit. which uses a slightly extended model from the literature, requires 48 parameters to achieve an overall unitless weighted standard deviation of 1.06 . The present fit includes essentially all available infrared and microwave transitions involving torsional levels below the top of the internal rotation barrier. (c: 1993 Academic Press. Inc.