Question

What is the correct decreasing order of stretching frequencies for C ≡ C, C = C and C — C? *​

Answer 1

Answer:In increasing order of the stretching frequency the carbon bonds are given C ≡ C> C = C > C — C. Explanation: the stretching frequency increases with increase in the number of Pi bond which is present in the carbon bond.

Answer 2

Decreasing order of stretching frequency -

C ≡ C > C = C > C - C

As stretching frequency directly proportional to bond energy and we know bond energy is directly proportional to no. of pi bonds.

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