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In an NMR experiment, shielding refers to the reduced impact of the ______on a nucleus due to the presence of ______around the nucleus. Shielding can be_____by the presence of more electronegative groups around the nucleus. A shielded nucleus appears further ______ whereas a deshielded nucleus appears further _____in an NMR spectrum.

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Answer:

In an NMR experiment, shielding refers to the reduced impact of the APPLIED MAGNETIC FIELD on a nucleus due to the presence of ELECTRON DENSITYaround the nucleus.

Shielding can be DECREASED by the presence of more electronegative groups around the nucleus.

A shielded nucleus appears further UPFIELD whereas a deshielded nucleus appears further downfield in an NMR spectrum.

Explanation:

1 There is reducece because alot of the electronegative atom binds more and thus reduce the electron density around the nucleus.

While a reduction in electron density bring about more nuclear magnetic field thus it resonates at higher frequency resulting downfield peak.
  1. In an NMR experiment, shielding refers to the reduced impact of the APPLIED MAGNETIC FIELD on a nucleus due to the presence of ELECTRON DENSITY around the nucleus.
  2. When Shielding can be DECREASED by the presence of more electronegative groups around the nucleus.
  3. A shielded nucleus has appeared further UPFIELD whereas a de shielded nucleus appears further downfield in an NMR spectrum.

  • When There is reduce because a lot of the electronegative atom binds more and also that thus reduces the electron density around the nucleus.
  • While a reduction in electron density brings about more nuclear magnetic field thus it resonates at higher frequency resulting downfield peak.

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