Answer to Question #136501 in Organic Chemistry for Haseeb

Question

The stretching frequency of C-H bond decrease in the order given below.
≡C-H(3300 cm-1
) ˃ =CH2 (3100 cm-1
) ˃ C-H (2900 cm-1
)
Justify it.

Answer 1

The stretching frequency of C-H bond decrease in the order given below.

≡C-H(3300 cm-1

) ˃ =CH2 (3100 cm-1

) ˃ C-H (2900 cm-1

This is due to hybridisation of carbon this is SP , SP^2 , SP^3 .