(A) have identical IR spectra because they have the same functional groups.
(B) have identical IR spectra because they have the same specific rotation.
(C) have different IR spectra because they are structurally different.
(D) have different IR spectra because they have different specific rotations.13 . In a molecule containing a carboxylic acid group, what would be expected in a ^1 H–NMR
spectrum?(A) A deshielded hydrogen peak for the hydroxyl hydrogen, shifted left
(B) A deshielded hydrogen peak for the hydroxyl hydrogen, shifted right
(C) A shielded hydrogen peak for the hydroxyl hydrogen, shifted left
(D) A shielded hydrogen peak for the hydroxyl hydrogen, shifted right14 . The coupling constant, J, is:(A) the value of n + 1 when determining splitting in NMR spectra.
(B) measured in parts per million (ppm).
(C) corrected for by calibration with tetramethylsilane.
(D) a measure of the degree of splitting caused by other atoms in the molecule.15 . The IR spectrum of a fully protonated amino acid would likely contain which of the
following peaks?I. A sharp peak at 1750 cm–1
II. A sharp peak at 3300 cm–1
III. A broad peak at 3300 cm–1
(A) I only
(B) I and II only
(C) II and III only
(D) I, II, and III