CHEM 14C Lecture Notes - Lecture 13: Chemical Shift, Atomic Orbital, Benzene
26 Jul 2018
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Is determined by examining energy manned for nuclear spin flip. Magnetic field causes the nuclear magnetic fields to become. The greater the strength of the applied magnetic field , the larger the energy difference blw the two spin states r. Aspin spin flip energy energy diff blw spin. Added to the sample it supplies the energy to cause the. The nucleus is in resonance when the spin flip occurs due to the appropriate magnetic and radio fields magnetic field strength. 3 . when nuclei return to their original state relaxation this emits electromagnetic signals whose frequencies depend on oe . Oe , shift goes to the left ( photon energy ) high chemical shift ww. Bo magnetic field experienced by nucleus due to. Nmr spectrometer field from e atoms equivalent nuclei that have the same magnetic can be tested by. Protons being tested shift can be rotated inverted in a. I t 12 ground nuclear spin axis and.
