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Chemistry Level 3

Take pent-3-ene-1-yne. Add N a N H X 2 \ce{NaNH2} followed by ethyl bromide. Then add excess of aq. K M n O X 4 \ce{KMnO4} to it followed by addition of periodate.

What is the number of final products in the end reaction (consider the compounds containing carbon only)?

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3 5 4 1 7 2 0 6

Aniket Sanghi by Aniket Sanghi , 21, India

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1 solution

Aniket Sanghi
Jun 10, 2016

0 Helpful 0 Interesting 0 Brilliant 0 Confused

http://www.masterorganicchemistry.com/reaction-guide/dihydroxylation-of-alkenes-with-cold-dilute-kmno4-to-give-vicinal-diols/ i feel that ans is 2

aryan goyat - 5 years ago

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see my report :{)}

A Former Brilliant Member - 4 years, 4 months ago

@aryan goyat Looks really surprising coz we have been taught(FIITJEE) this that KMno4 does also oxidises alkyne and then 2 molecules of water eliminate to form the diketone. I'm sure the reaction DOES NOT proceed with a peroxy acid followed by hydrolysis, but masterorganicchemistry.com is RARELY incorrect. Confusing :(

Ayushmaan Seth - 4 years, 8 months ago

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So according to you what is the correct answer

Aakhyat Singh - 3 years, 8 months ago

Isnt alkene electron density higher than alkyne electron density. So attack should be on alkene.

Amritaansh Narain - 1 year, 11 months ago

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