Question

Qualitatively, an IR spectrum of the S enantiomer will be [ Select ] ["shifted upfield", "exactly the same", "exactly the opposite", "shifted downfield"] , when compared to the IR spectrum of the R enantiomer

Answer 1

Qualitatively, an IR spectrum of the S-enantiomer will be : "Exactly the same" when compared to the IR spectrum of the R-enantiomer.

The IR spectrum is based on streching frequencies, which does not change with the chirality of the moelcule, unless we are talking about diastereomers with entirely different intramolecular type of bonding interactions present in the system which would increase or decrease the strength of the bonds in the molecule by relative electron shifts. Thus in the present scenario the shift would just be the same for the two enatiomer.