The allyl radical has how many electrons in bonding molecular orbitals? a) 1 b) 2 c) 3 d) 4 e) 5 2) Which carbocation would be least stable? 3) Which carbocation would be most stable? a) b) + CH2CH2CH=CHCH3 c) d) e) 4) Which of the following dienes would you expect to be the most stable? a) CH3CH=CHCH=CHCH3 b) CH3CH=CHCH2CH=CH2 c) CH2=CHCH2CH2CH=CH2 d) CH2=CHCH(CH3)CH=CH2 5) Considering both configurational and conformational factors, select the most stable form of 2,4 -hexadiene. I I III IV V 6) Which is not an example of resonance? I CH2=CHCH2CH2CH=CH2 II III IV CH2=CHCHCH2CCl3CH2CH=CHCH2CCl3 7) Select the structure of the conjugated diene. I II III IV V a) I b) II c) III d) IV e) V