SPIN-SPIN COUPLING

• WHAT IS SPIN-SPIN COUPLING?

  when peaks are split into patterns as the applied magnetic field felt by H atoms is affected by magnetic field of H atoms on neighbouring C atoms
• RULE?

  n+1 rule
• WHAT IS THE n+1 RULE?

  n Hs on an adjacent C atom with split a peak into n+1 smaller peaks
• RATIOS FOR ADJACENT HYDROGENS?

  ONE: 1:1

  TWO: 1:2:1

  THREE: 1:3:3:1