HSO is an intermediate in the atmospheric oxidation of H2S, and it has been implicated in ozone depletion. Calculated wavenumbers for the fundamental modes of vibration of HSO are 2335, 1077 and 10O2 cm-1. These are assigned to stretching, bending and stretching modes, respectively. Deuteration causes the fundamental modes of vibration to shift to 17O4, 772 and 1O41 cm-1,
(a) Is the HSO molecule linear or bent?
(b) Draw one or more resonance structures to describe the bonding in HSO.
(c) How many of the fundamental modes of vibration are TR active?
(d) Which of the modes of vibration (2335, 1077 or 10O2 cm1) arises from the S-H stretch? Use the deuteration data to confirm your assignment,
(e) Suggest why HSO is associated with ozone depletion.
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