12.5 Summary of rules for resonance 12.5A Rules for writing resonance structures 1. Resonance stuctures exist only on paper. 2. In writing resonance structures we are only allowed to move electrons 23 H1C=C—ch H1C♀=cHt CH3 CHCH=CH,2 chrCHCHCH CH,=CH12.5 Summary of rules for resonance 12.5A Rules for writing resonance structures 1. Resonance stuctures exist only on paper. 2. In writing resonance structures we are only allowed to move electrons. H2 C C H CH2 H2 C C H CH2 1 2 3 1 2 3 + + CH3 CHCH=CH2 CH3 CH=CHCH2 + CH2 CH2 CH=CH2