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NMR Spectroscopy Simulator

Interactive 3D nuclear magnetic resonance simulator: watch proton spin ensembles precess around an external field for real molecules (ethanol, acetaldehyde, toluene) while a live 1H NMR spectrum builds from chemical shift and spin-spin (J) coupling.

Chemistry & Materials3DAdvanced60 FPS⚡ Plasma

Nuclear magnetic resonance identifies a molecule's structure from how its own protons behave inside a magnetic field. This simulation places a virtual sample — ethanol, acetaldehyde or toluene — inside a spectrometer: each chemically distinct group of protons precesses around the field at its own Larmor frequency, and a live 1H NMR spectrum builds below from those chemical shifts (δ) and spin-spin (J) coupling patterns. Change the field strength to see resolution improve, or dial in line broadening to watch multiplets blur into a single hump.

⚙ Under the hood

Interactive 3D nuclear magnetic resonance simulator: proton groups of a chosen molecule (ethanol, acetaldehyde, toluene) precess around an external magnetic field at their own Larmor frequency while a live 1H NMR spectrum builds from chemical shift and spin-spin (J) coupling.

Three.jschemistryNMRspectroscopymolecular structurephysical chemistry

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install