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Topic: relationship between isotope weight and shielding?  (Read 2303 times)

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Offline a student

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relationship between isotope weight and shielding?
« on: December 08, 2009, 10:38:13 AM »
hi
as  you may know replacement of a lighter isotope (in 1HNMR and also in 13CNMR) specially in 13CNMR with heavier isotope result in an increased shielding!! the only difference is a neutron so what the reason is??
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