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← ScienceWhich consequence results when the van der Waals radius limits approach within conjugated polymers?
A)Increased exciton binding energy offsets
B)Enhanced nucleophilic aromatic substitution
C)Steric hindrance reduces polymer conjugation✓
D)Increased hyperconjugation stabilizes radical
💡 Explanation
Steric hindrance disrupts planarity, reducing orbital overlap along the polymer. This effect disrupts electron delocalization via decreased conjugation of pi bonds, because the polymer chains cannot align properly; therefore conjugation decreases, rather than enhancement of excitions or hyperconjugation, which require orbital overlap.
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