Comments on: Alkene Addition Pattern #3: The “Concerted” Pathway https://www.masterorganicchemistry.com/2013/04/02/epoxidation-hydroxylation-cyclopropanation-alkene-mechanism/ Tue, 23 Jan 2024 20:30:08 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Prahlad https://www.masterorganicchemistry.com/2013/04/02/epoxidation-hydroxylation-cyclopropanation-alkene-mechanism/#comment-534529 Sun, 24 Jun 2018 17:34:00 +0000 https://www.masterorganicchemistry.com/?p=7177#comment-534529 Great website. I have been a regular reader for some time now. Extremely useful and lucid content. Loved it Sir!

]]> By: James https://www.masterorganicchemistry.com/2013/04/02/epoxidation-hydroxylation-cyclopropanation-alkene-mechanism/#comment-246008 Tue, 19 Aug 2014 15:59:36 +0000 https://www.masterorganicchemistry.com/?p=7177#comment-246008 In reply to Collin Zeng.

The first step, addition of hydrogen and palladium to multiple bonds is concerted (hydropalladation). And the second step (reductive elimination) preserves the stereochemistry at the carbon. Since hydropalladation is usually beyond the scope of introductory organic chemistry, it is not too much of a stretch to say that hydrogenation is concerted.

]]> By: Collin Zeng https://www.masterorganicchemistry.com/2013/04/02/epoxidation-hydroxylation-cyclopropanation-alkene-mechanism/#comment-242383 Mon, 18 Aug 2014 02:03:32 +0000 https://www.masterorganicchemistry.com/?p=7177#comment-242383 Are you sure that the hydrogenation of alkenes and alkynes is concerted?

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