the answer displated is incorrect, please provide the correct answer and explana

Question

the answer displated is incorrect, please provide the correct answer and explanation

The compound shown will give clues to its structure by which of the following spectral features? (Assume there is no magnetic coupling with the aldehyde proton.) True An important pair of moderately strong absorptions at about 800 and 900 wavenumbers (IR) FalseA strong, broad absorption at about 1800 wavenumbers (IR) TrueA strong, sharp absorption at about 1730 wavenumbers (IR) (True) True A sharp singlet in the region of delta = 9.8 ppm (NMR) False A triplet at about delta = 6.8 ppm , integrating for 2 protons (NMR) Submit Answer Incorrect. Tries 9/10 Previous Tries

Explanation / Answer

False. An important pair of moderately strong absorptions at about 800 and 900 wave numbers.

False. A strong, broad absorption at about 1800 wavenumbers.

True. A strong, sharp absorption at about 1730 wave number ( carbonyl stretch of aldehyde).

True. A sharp singlet in the region of delta = 9.8 ppm ( aldehyde carbon).

False . A triplet at about delta = 6.8 ppm, integrating for 2 protons. (triplet at delta 2.5, alpha carbon of aldehyde)

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