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← ScienceWhich consequence results when an applied magnetic field perturbs electronic orbitals?
A)Shielding reduces NMR signal frequency✓
B)Increased electron-electron repulsive forces
C)Enhanced single electron anti-shielding constant
D)Decreased overall electron binding energy
💡 Explanation
Shielding reduces NMR signal frequency because the Larmor precession frequency shifts due to **diamagnetic shielding**. Since electron density redistributes because orbitals distort inducing electron currents, the magnetic field experienced decreased, therefore NMR frequencies are lower, rather than electrons being directly unbound.
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