An alkyne C-H bond absorbs at higher wave number than an alkene C-H bond. What does this tell you about the strength of these two bonds? Multiple Choice The alkyne C-C bond is stronger. The alkene C-C bond is stronger. The alkene C-H bond is stronger. The alkyne C-H bond is stronger.

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Chemistry

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15 January, 12:45

An alkyne C-H bond absorbs at higher wave number than an alkene C-H bond. What does this tell you about the strength of these two bonds? Multiple Choice The alkyne C-C bond is stronger. The alkene C-C bond is stronger. The alkene C-H bond is stronger. The alkyne C-H bond is stronger.

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Dominick Pena · Answer 1

The alkyne C-C bond is stronger than an alkene C-C bond.

Explanation:

The frequency of the stretching vibration depends on the mass of the atoms and the stiffness of the bond. Therefore, an increase in restoring force increases bond strengths, the absorption frequency increases towards a higher wave number.

The alkyne C-C bond is therefore stronger than the alkene C-C, although theoretically, The C-H bond stretch is slightly affected by the hybridization of the C-H bond.