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.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

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

s-Complex of Acetylene


Hydrocarbon comparison

Hydrocarbon Comparison

Alkyne nomenclature

Alkyne Nomenclature

Enes with ynes

Enes with Ynes

Catalytic hydrogenation

Catalytic Hydrogenation

Lindlar s catalyst

Lindlar’s Catalyst

H 2 on a poisoned catalyst prevents over reduction cis alkenes

H2 on a Poisoned CatalystPrevents Over-Reductioncis Alkenes

Addition of hx

Addition of HX

Br 2 addition

Br2 Addition

Hydration oxymercuration markovnikov

Hydration: OxymercurationMarkovnikov

Enol keto tautomerization intermolecular

Enol – Keto TautomerizationIntermolecular

Oxymercuration mechanism

Oxymercuration Mechanism

Hydration hydroboration anti markovnikov

Hydration: HydroborationAnti-Markovnikov

Hydroboration mechanism

Hydroboration Mechanism

Draw the products

Draw the Products

Acidity of terminal alkynes

Acidity of Terminal Alkynes

Acetylide formation

Acetylide Formation

Alkylation of acetylide ions homologations using s n 2 rxn

Alkylation of Acetylide IonsHomologations using SN2 rxn

Multi step syntheses

Multi-step Syntheses

Retrosynthetic analysis begin with the product

Retrosynthetic AnalysisBegin with the Product

Fill in the reagents

Fill in the Reagents

How many steps

How Many Steps?

5 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