Some Dienes H CH >c-cxc-c< AC兰CU conjugated double bonds L,3-pentadiene (more stable than isolated double bonds) CH, CH, isolated double bonds 1,4-pentadiene
Some Dienes
Some Conjugated Molecules Vitamin A Benzene Cyclohex-2-enone
Some Conjugated Molecules O H Vitamin A Benzene O Cyclohex-2-enone
Prevents DNA from Unraveling OH OH OCH3 CH3 NH OH Doxorubicin (adriamycin Binds to DNA and inhibits the enzyme topoisomerase II
Prevents DNA from Unraveling O O OH OH OCH3 O OH OH O NH2 OH CH3 Doxorubicin (adriamycin) Binds to DNA and inhibits the enzyme topoisomerase II
Orbital Depiction of Ethylene node π* (antibonding)= destructive overlap energy of the isolated p orbitals on C1 and C2 energy 元 (bonding)= constructive overlap
Orbital Depiction of Ethylene
Orbital Depiction small amount of overlap partial double bond H 1.34A H H H C 4H 1.48A 1.34A H H
Orbital Depiction
△hydrogenation cumulated terminal diene alkyne =C 1,2-pentadiene 1-pentyne internal alkyne 69.8 2-pentyne kcal isolated K3ou 69.5 diene kcal isolated 65.8 1,4-pentadiene diene kcal trans-1.4-hexadiene conjugated 60.2 diene keal 入◇ 57.4 kcal trans-1,3-pentadiene 53.7 kcal alkane (pentane or hexane)
DHhydrogenation