alkynes

Synthesis (5) – Reactions of Alkynes

Synthesis (5) – Reactions of Alkynes

January 29, 2014

Today, we’re going to add the reactions of alkynes to our reaction map, which will bring to a close all the major reactions we’ve discussed so far in a typical first semester course. Like alkenes, the main…

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Alkynes Are A Blank Canvas

Alkynes Are A Blank Canvas

June 24, 2013

Now that we’ve gone through all the major reactions of alkynes, we can take a step back and look at the big picture. There are lots of reactions of alkynes. So what? you might ask. In this post I will try to c…

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Alkyne Addition Reactions – The “Concerted” Pathway

Alkyne Addition Reactions – The “Concerted” Pathway

June 4, 2013

How does the chemistry of alkynes compare to alkenes? As we’ve seen in some previous posts, there are some significant differences, but a lot of the chemistry “rhymes”, if you will. In the series on …

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Alkyne Addition Reactions: The 3-Membered Ring Pathway

Alkyne Addition Reactions: The 3-Membered Ring Pathway

May 29, 2013

Last time we discussed the similarities (and differences) between the carbocation pathway for alkenes and alkynes. In this post, we’ll do the same for the “3-membered ring pathway”. If you’ll r…

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Hydroboration and Oxymercuration of Alkynes

Hydroboration and Oxymercuration of Alkynes

May 14, 2013

Alkyne chemistry bears many resemblances to alkene chemistry, but in these first few posts on the subject, the purpose is to illustrate how one seemingly minor change – an extra π bond – can lead to sign…

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The 2 Most Important Reactions of Alkynes

The 2 Most Important Reactions of Alkynes

May 1, 2013

With the series of posts on alkenes in the can, let’s move on and talk about a closely related functional group that shares many reactions in common with alkenes: acetylenes, or as they are more commonly referre…

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Summary Sheet: Functional Groups

Summary Sheet: Functional Groups

August 21, 2012

I thought it would be good to make a summary sheet based on functional groups, so here one is: Functional Group Summary Sheet (PDF) You can find other sheets in the Summary Sheets section of this site. In addition, I …

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Reaction Friday – Reduction of Alkynes to Alkenes with Na/NH3

Reaction Friday – Reduction of Alkynes to Alkenes with Na/NH3

April 6, 2012

My apologies for the interruption. I seem to have wrested control of my blog back from the cats for now, but I’m not sure how long this will last. Clever little bugger. One thing I can say though – the cat…

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Reagent Friday: Sodium (Na)

Reagent Friday: Sodium (Na)

October 7, 2011

In a blatant plug for the Reagent Guide and the Reagents App for iPhone, each Friday  I profile a different reagent that is commonly encountered in Org 1/ Org 2.  Today’s topic, sodium metal is a pretty no…

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Reagent Friday: Lindlar’s Catalyst

Reagent Friday: Lindlar’s Catalyst

August 19, 2011

In a blatant plug for the Reagent Guide, each Friday  I profile a different reagent that is commonly encountered in Org 1/ Org 2. Version 1.2 just got released, with a host of corrections and a new page index.  One…

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