Why Does Methylamine Deprotonation Result in a Negative Charge on Nitrogen?

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SUMMARY

The discussion centers on the deprotonation of methylamine (CH3NH2), resulting in the formation of CH3NH (with a negative charge on nitrogen) rather than CH2=NH2 (which would have a positive charge on nitrogen). The key reason for this outcome is the relative acidity of the hydrogen atoms and the stability of the resulting conjugate anion. The intramolecular proton transfer does not occur significantly because the conjugate anion is a stronger base than the amine hydrogen, influenced by electronegativity considerations.

PREREQUISITES
  • Understanding of acid-base chemistry
  • Knowledge of methylamine structure and properties
  • Familiarity with electronegativity concepts
  • Basic grasp of intramolecular reactions
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  • Research the concept of conjugate bases in acid-base reactions
  • Study the electronegativity trends in the periodic table
  • Explore intramolecular proton transfer mechanisms
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Chemistry students, organic chemists, and anyone interested in understanding acid-base behavior and molecular stability in organic compounds.

bomba923
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Why is it that when methylamine ([tex]CH_3 NH_2[/tex]) loses a proton,

you get [tex]CH_3 NH[/tex] (with a negative charge on nitrogen) rather than [tex]CH_2 = NH_2[/tex] (with a positive charge on nitrogen) ?
 
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So you're basically saying that an intramolecular proton transfer will occur, either that or you're basically asking on why the carbon hydrogen in less acidic then the one on the amine. If it is in reference to the latter...read you text. The intramolecular reaction does not occur appreciably (to my knowledge) because the conjugate anion is a stronger base than even the amine hydrogen.
 
Think in terms of electronegativity. Which atom is more likely to bear a negative charge?
 

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