Which of the following stretches are infrared-active (i.e. show a signal in the infrared spectrum)? The C=C stretch of trans-2-hexene The C=C stretch of cis-2-hexene The C=O stretch of propanone The C≡C stretch of 1-butyne The C≡C stretch of 2-butyne

Which of the following stretches are infrared-active (i.e. show a signal in the infrared spectrum)? The C=C stretch of trans-2-hexene The C=C stretch of cis-2-hexene The C=O stretch of propanone The C≡C stretch of 1-butyne The C≡C stretch of 2-butyne

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter21: Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

Section21.10: Spectroscopy Of Carboxylic Acid Derivatives

Problem 26P

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Concept explainers

NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.

Question

Which of the following stretches are infrared-active (i.e. show a signal in the infrared spectrum)?

The C=C stretch of trans-2-hexene
The C=C stretch of cis-2-hexene
The C=O stretch of propanone
The C≡C stretch of 1-butyne
The C≡C stretch of 2-butyne

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