Hydroboration Reaction with BD3

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Discussion Overview

The discussion revolves around the hydroboration/oxidation reaction of 1-methylcyclopentene using deuterated borane (BD3). Participants explore the expected products, mechanisms, and methods for carrying out the reaction, including the addition of deuterium.

Discussion Character

  • Homework-related, Exploratory, Technical explanation

Main Points Raised

  • One participant inquires about the product of the hydroboration/oxidation reaction with BD3 compared to BH3, questioning whether the outcome would be the same or different.
  • Another participant suggests writing out the detailed mechanism to determine the product.
  • A participant expresses uncertainty about the addition of deuterium and hydroxyl groups, indicating they believe D and OH will be added based on their mechanism.
  • There is a question regarding the methodology for carrying out the reaction, specifically how to add two deuterium atoms to 3-hexyne.
  • One participant proposes using H2 and a Lindlar catalyst for hydration before adding deuterium, seeking clarification on the process.
  • A later reply acknowledges the previous point and suggests using D2 with the Lindlar catalyst instead.

Areas of Agreement / Disagreement

The discussion contains multiple viewpoints regarding the expected products and methods for the reaction, with no consensus reached on the specifics of the mechanism or the correct approach to adding deuterium.

Contextual Notes

Participants express uncertainty about the exact products and mechanisms involved, and there are unresolved questions about the steps necessary to achieve the desired deuteration.

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Homework Statement


What would be the product of a Hyrdroboration/ oxidation reaction of 1-methylcyclopentene with deuterated Borane, BD3?

Homework Equations





The Attempt at a Solution

I know the solution for a reaction with BH3. However, would this give you the same answer or a totally different one?
 
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Write out the detailed mechanism and you will have your answer.
 
Ummm, so does that mean that a D and an OH will be added? Because that's what I get when I write it out, and I'm not sure if that's right...

Also, how would one carry out this reaction?

3-hexyne ----------------> 3,4-dideuterio-3-hexene

I know the first step would be to hydrate with H2 and Lindlar catalyst, but how would you go about adding the two D's?

-Thanks!
 
Last edited:
What product would you get if you added H2 across the double bond? How about D2?
 
Ah, okay, I see your point now. I'd add D2 with the Lindlar catalyst instead. Thank you!
 

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