Nuclear Magnetic Resonance Spectroscopy | H-NMR | Class 12

H NMR (Proton Nuclear Magnetic Resonance) spectroscopy is like a map of hydrogens in a molecule! 🗺️

- How it works:
- Apply magnetic field → protons align
- Radio waves flip spins → protons absorb energy
- Signals depend on H environment (chemical shift, δ in ppm)
- Key info from H NMR
- Chemical shift (δ)Where peaks appear (e.g., 0-2 ppm for alkyl Hs, 7-8 ppm for aromatics)
- Integration:Area under peak ∝ number of Hs
- Examples:
- CH₃CH₂Cl: 2 signals (CH₃, CH₂)
- Benzene: 1 signal (all Hs equivalent)
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