Question

I need help with these questions:

6. which of the following dienes will liberate the most heat upon hydrogenation of the double bonds?

7. Which of the following aldehydes will have a $\lambda _m_a_x$ at the longest wavelength?

8. Predict the major product of the following reaction

9. Ignoring geochemistry, which of the molecules below is 7-bromo-bicyclo[4.3.2]-3-undecene

10. which of the structure above represents a fused bicyclic compound?

Answer 1

Solution: 6) Heat of hydrogen a / yorogen a Stability of alkene no.ojo-Hydbwogen (B) (C) (D) No. of - Hydrogen > 1A).. A = = 3 = 5 a = 4 & Heat of hydr Boc) D P Order of Shabity of alkene T so heat of hydrogenation - A> A> C> B. a 7 conjugation increase Amass too. BEO (A) (B) (C) D has a more conjugation than a B has no conjugation -» в оt е мJan 10" order of duay Dycyny B

9) Structure of 7 bromo-bicyclo [ 4.3.2 1-3-UPUU log o because there is no bridge - fused structure - pada suami andare viata sana Others are bridged structure te E ostulture