Ethyne (HCCH) does not show IR absorption in the region 2000-2500 cm-1 because:
A. C-H stretches occur at lower energies.
B. CC stretches occur at about 1640 cm-1.
C. there is no change in the dipole moment when the CC bond in ethyne stretches.
D. there is a change in the dipole moment when the CC bond in ethyne stretches.
Answer:C
Ethyne (HCCH) does not show IR absorption in the region 2000-2500 cm-1 because:
A. C-H stretches occur at lower energies. B. CC stretches occur at about 1640 cm-1. C. there is no change in the dipole moment when the CC bond in ethyne stretches. D. there is a change in the dipole moment when the CC bond in ethyne stretches.