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.
Correct Answer:
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