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The structure and tunneling motion of acetylene dimer studied by free-jet infrared absorption spectroscopy in the 14 μm region

✍ Scribed by Yasuhiro Ohshima; Yoshiyasu Matsumoto; Michio Takami; Kozo Kuchitsu

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
476 KB
Volume
147
Category
Article
ISSN
0009-2614

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✦ Synopsis

A rotationally resolved a-type band of the (C2H2)* complex is studied in the monomer us band region ( c 730 cm-') by freejet infrared absorption spectroscopy. The determined B and C constants indicate that the complex has a hydrogen-bonded Tshaped structure with Czu symmetry. The distance between the centers of mass of the two monomer subunits is 4.41 A. Each rotational line is found to split into three components. The triplet structure and the intensity alternation due to the nuclear spin statistics are well accounted for in terms of the internal rotation of the monomer among four equivalent T-shaped configurations.

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