20.5.1 Deduce reaction pathways given the starting materials and the product IB Chemistry HL





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Published on Feb 1, 2012

Why are you reading this? Two steps maximum and don't forget reactants, conditions and any catalysts.

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Comments • 14

Zaid Matalka
for the bromoethane one you could have used Br2 with UV to make 1,2 dibromo ethane 
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How do you know whether an elimination will occur via E1 or E2? 
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talal warsi
Chemistry P1, P2 tomorrow and I would just like to say that these videos have been my go-to study resource for Chem and we are all just so grateful.  It's been a whole 2 years with your videos and it's unfortunately come to an end. :'(
Klaudia Borbély
Your first example is in the syllabus "teacher´s note" but the IB states that 1-bromoepropane can be reacted with potassium cyanide to form propanenitrile, which can then be reduced by heating with hydrogen and nickel catalyst. PLEASE TELL ME THEY ARE WRONG??! It should be butanenitrile as you said in the video, right? 
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Jared Vanmali
couldn't the last step in the reaction from ethylamine to N-diethylamine use ethanol where there is a condensation reaction or is this not possible?
Richard Thornley
You don't need to know the mechanisum for IB and "ethyl methanamide" is correct. C2H5- is ethyl NCHO is methanamide the old name is ETHYLFORMAMIDE (but I had to double check!) 
Jenny Jumaian
Can you please explain further the mechanism for example 2 (4:44)? I think the names of the compounds are incorrect because you drew Methyl-Ethanamide and not ethyl-methanamide... Thanks!
Philip Pincus
IB Chemistry HL tomorrow. You have been such great help!
I have told everybody lol! Our college just started ib this year and we're the guinea pigs, so these videos are saving our lives =] will make sure to practice the past papers 
Richard Thornley
Good luck - practice the past papers too! (Oh and tell yer friends if you find this channel helpful)

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