Delta (δ)

Definition

In the context of Nuclear Magnetic Resonance (NMR) Spectroscopy in organic chemistry, delta (δ) represents the chemical shift, a dimensionless number that indicates the change in magnetic environment of a nucleus. It is measured in parts per million (ppm) and provides insights into the electronic environment surrounding a nucleus, helping to identify molecular structure.

Related terms

NMR Spectroscopy:

A technique used to observe local magnetic fields around atomic nuclei, offering detailed information about the structure, dynamics, reaction state, and chemical environment of molecules.

Chemical Environment:

Refers to the surrounding atoms and electron densities that influence a nucleus' magnetic field in NMR spectroscopy, affecting its chemical shift.

Shielding Effect: The phenomenon where electrons surrounding a nuclear atom reduce the external magnetic field experienced by the nucleus, influencing its chemical shift in NMR analysis