NMR Chemical Shift Calculator

Analyze NMR Spectroscopy Data

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¹H NMR Analyzer

Analyze proton NMR chemical shifts and coupling

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¹³C NMR Analyzer

Analyze carbon NMR chemical shifts

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Coupling Pattern Predictor

Predict coupling patterns and multiplicities

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Understanding NMR Spectroscopy

Basic Concepts

Key principles:

  • Chemical shift
  • Integration
  • Multiplicity
  • Coupling constants

Chemical Shifts

Common ranges:

  • Alkyl (0-2 ppm)
  • Alkene (4-7 ppm)
  • Aromatic (6-8 ppm)
  • Aldehyde (9-10 ppm)

Coupling Patterns

Common patterns:

  • n+1 rule
  • Pascal's triangle
  • First-order coupling
  • Complex coupling

Applications

Uses in chemistry:

  • Structure determination
  • Purity analysis
  • Reaction monitoring
  • Conformational analysis

Advanced Topics

Special cases:

  • 2D NMR
  • NOE effect
  • Dynamic NMR
  • Paramagnetic shifts

Essential NMR Rules

Chemical Shift

δ = (ν - νref)/νref × 10⁶

Coupling Constant

J = Δν (Hz)

Integration

Area ∝ Number of protons