Answer to Question #233195 in Organic Chemistry for Riya

Question

6. (4 pts) Terminal alkynes have good regioselectivity, while internal alkynes often form mixtures-explain.

Answer 1

The hydroboration of terminal alkynes produces aldehyde products while internal alkynes produce ketone products. The hydroboration of symmetrical alkynes produces one ketone product and asymmetrical alkynes produce a mixture of product ketones.