Abstract
Pure rotational measurements have been made on nine isotopic species of the unstable symmetric-top molecule bromostannane, SnH3Br, using a microwave spectrometer. The Sn–Br bondlength is 2.4691 ± 0.0003 Å. Quadrupole hyperfine structure due to the bromine nuclei gives values of eQq (79Br) = 350 ± 6 MHz and eQq (81Br) = 291 ± 6 MHz. A centrifugal-distortion constant, DJK = 0.0069 ± 0.0004 MHz affords a best fit to the complex K structure of observed transitions.
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