Sponsored Links
This presentation is the property of its rightful owner.
1 / 27

Alkynes PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

Alkynes. Reaction Acidity Synthesis. s- Complex of Acetylene. p- Bonds. Hydrocarbon Comparison. Alkyne Nomenclature. Enes with Ynes. Catalytic Hydrogenation. Lindlar’s Catalyst. H 2 on a Poisoned Catalyst Prevents Over-Reduction cis Alkenes. Addition of HX. Br 2 Addition.

Download Presentation


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript





s-Complex of Acetylene


Hydrocarbon Comparison

Alkyne Nomenclature

Enes with Ynes

Catalytic Hydrogenation

Lindlar’s Catalyst

H2 on a Poisoned CatalystPrevents Over-Reductioncis Alkenes

Addition of HX

Br2 Addition

Hydration: OxymercurationMarkovnikov

Enol – Keto TautomerizationIntermolecular

Oxymercuration Mechanism

Hydration: HydroborationAnti-Markovnikov

Hydroboration Mechanism

Draw the Products

Acidity of Terminal Alkynes

Acetylide Formation

Alkylation of Acetylide IonsHomologations using SN2 rxn

Multi-step Syntheses

Retrosynthetic AnalysisBegin with the Product

Fill in the Reagents

How Many Steps?

5 Steps

Compound A, C9H12, absorbs 3 equivalents of H2 on catalytic reduction over palladium to give B, C9H18. On reaction with acidic KMnO4, compound A gives, among other things, a ketone that was identified as cyclohexanone. On treatment with NaNH2 in NH3, followed by addition of iodomethane, compound A gives a new hydrocarbon C, C10H14. What are the structures of A, B and C?

  • Login