✦ LIBER ✦

Hexapole focusing and orientation of HCl and HBr via their hydrogen-bonded complexes with benzene

✍ Scribed by Suketu R. Gandhi; Richard B. Bernstein

Book ID: 103029640
Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 449 KB
Volume: 143
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)87042-8

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✦ Synopsis

Polar diatomic molecules such as the hydrogen halides (HX) cannot be readily oriented by conventional electrostatic field techniques. However, by forming the 1: 1 hydrogen-bonded complex with benzene (a floppy CBv symmetric top) the HX becomes orientable via the electric hexapole focusing method. Oriented-molecule beams of C6H6-HCl and C6H,-HBr have been prepared and studied. From the threshold focusing voltage their electric dipole moments have been estimated: 1.6 & 0.1 and 1.2-t 0.1 D for C6H6-HCl and -HBr, respectively. These results confirm the substantial dipole moment enhancement of HX upon hydrogen bonding, measured accurately for the C6H6-HF complex by Klemperer and co-workers (1983).

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