anonymous
  • anonymous
How do I find the most basic atom (most likely to accept H+) in a molecule?
Organic
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
There are two OH groups and a NH2 group...
Rushwr
  • Rushwr
To accept H+ (protons) The basic atom should have lone pairs :)
anonymous
  • anonymous
Thanks! All three possibilities have lone pairs. One lone pair on the N and 2 lone pairs on the O

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Rushwr
  • Rushwr
@taramgrant0543664
taramgrant0543664
  • taramgrant0543664
It depends on the acidity and basicity of the lone pairs
Rushwr
  • Rushwr
that's how I thought too !
taramgrant0543664
  • taramgrant0543664
The one that is more basic is the one that H+ will attach to
Photon336
  • Photon336
This is a question of Basicity; which one is most likely to accept an H+ means the element that is more likely to donate it's a pair of electrons. for this I relate this concept to how nucleophilic the element is, meaning it's tendency to donate a pair of electrons. Oxygen and Nitrogen; oxygen is more electronegative that nitrogen, meaning that it's less likely to donate electrons. Nitrogen; is less electronegative more likely to give up a pair of electrons and accept an H+ I would say it's the nitrogen
Rushwr
  • Rushwr
@taramgrant0543664 But I thought in the way orgoldfish thought. Cuz when u have more lone pairs the ability to attract protons is high. Thus the basicity increases due to the attraction of higher number of H+
Photon336
  • Photon336
I feel that the molecule needs to be more likely to give up it's electrons and take on a proton. if something is acidic then it's more likely that it's going to give up a proton, and it's conjugate base is going to be stable, that atom must be able to stabilize the negative charge well other wise it wouldn't want to lose the proton.
taramgrant0543664
  • taramgrant0543664
The lone pair on the neutral N in the NH3 is more stable than the anionic lone pair on O in OH. Therefore, the lone pair on NH3 is less basic. The conjugate acid of OH is water which has a pKa = 15.7. The conjugate acid of NH3 is NH4+ which has a pKa = 9. Therefore, NH3 has the more acidic conjugate acid and is the weaker base. Basic atoms in a molecule will have lone pairs, to accept the proton(s). So I'm thinking oxygen
welshfella
  • welshfella
I agree with taramgrant
Photon336
  • Photon336
@abb0t thoughts?
abb0t
  • abb0t
Perhaps an example might help?

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