Bredt's Rule · Why Bridgehead Alkenes Refuse to Exist
unseel.com · bridgehead · π-twist · olefin strain
system bicyclic cage
twist φ 0°
OSE — kcal/mol
step —
cage carbons
bridgehead C1 / twisted p
partner p orbital
π overlap / strain
isolable (S ≥ 7)
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