Which of the following stretches are infrared-active (i.e. show a signal in the infrared spectrum)?
a. The C=C stretch of trans-2-hexene
b. The C=C stretch of cis-2-hexene
c. The C=O stretch of propanone
d. The C≡C stretch of 1-butyne
e. The C≡C stretch of 2-butyne
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good morning bud ty for the free points i hope u have a great day : )
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