(a) Explain why the SH stretching absorption in the IR spectrum of a thiol is less intense...
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(a) Explain why the S—H stretching absorption in the IR spectrum of a thiol is less intense and occurs at lower frequency (2550 cm–1) than the O—H stretching absorption of an alcohol.
(b) Is the wavenumber difference between O—H and S—H absorptions caused primarily by the greater mass of sulfur or by the relative strengths of the two bonds? Explain how you know.
(c) Two unlabeled bottles, A and B, contain liquids. Laboratory notes suggest that one compound is (HSCH2CH2)2O and the other is (HOCH2CH2)2S.
The IR spectra of the two compounds are given in Fig. P12.33. Identify A and B and explain your choice.
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a b c The bond dipole of the SH bond is much less than that of the OH bond because the electroneg ativities of sulfur and hydrogen differ less than do ...View the full answer
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