Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: LuckyDude35 on September 08, 2004, 01:12:47 AM
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Ok, I have a question. I have a homework assignment that wants me to decide whether the major reaction is: proton transfer, substitution, or elimination and write them out. I need examples to tell which one to use or maybe a check list approach that I can follow to do the 10 problems. ANY help would be greatly appreciated, thank you very much!
Confused in California
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Elimination would mean a double bond is formed. Substitution would mean an atom was replaced with an other atom. Perhaps if you posted one of the questions we can work it out with you.
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Ok here goes:
bromomethane + hydrogen Sulfide (HS-) in DMF
Thank you very much!
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Another one is:
1-methylcyclopentanol + HCL at 0 degrees C
I just don't know how to get started, my teacher didn't give us any examples to go off of. Thank you for your help
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Out of those 3 compounds are there any good leaving groups in any of them?
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Isnt the BR a leaving group?
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Yes you can kinda tell the Br- is a good leaving group. Can you also tell that the HS- has a lot of electron density around it which makes is a good nuleophile?
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I thought it was a good nucleophile but wasn't sure, so that means this is a SN1 or SN2 reaction?
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Which one, SN1 or SN2, likes to have the carbon be least substituted with other R-groups?
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I know the SN2 is primary, so SN2?
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Yes, I think you understand the material just sit down with it and if you still have some questions go ahead and ask them.
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To be perfectly honest I feel like I have no idea what I am doing with some of these. I saw the DMF, and I know that is polar aprotic and i know that is supposed to be SN2, does that mean that all the one with DMF are SN2?
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I drew out the equation and have a question, does the Br which left then attach to the H which was now alone after the S substituted for the BR?
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No, the S is still attached to the S. We did no Chemistry to remove it from the S.