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- In the next chapter we'll look at cycloalkanes—saturated cyclic hydrocarbons—and we’ll see that the molecules generally adopt puckered, nonplanar conformations. Cyclohexane, for instance, has a puckered shape like a lounge chair rather than a flat shape. Why?Which of the following is the highest energy chair conformer of the most stable isomer of 1-ethyl-2,4-dimethylcyclohexane? A | B II C) III IV = || ||| > INQ2. Which one of the following structures is the most stable conformation for 2-bromo butane (viewing down the C2-C3 bond axis where C2 is front carbon and C3 is back carbon) Br H H H **** CH, CH₂ (B) Br (A) H H (D)
- a) Draw the two ring flipped conformers of each molecule A and B. Indicate the more stable conformer, respectively. CH3 fCH3 H,C. CH3 H3C. CH3 CI CI A B a) Which is more stable between A and B? Why?Rank these conformations from least to most stable (less stable < more stable). H. CH3 H3C. H3C CYH `H. H. H3C H H3C ČH3 II II O 1. I| < IIIPerspective drawings of Chair and Boat Conformers fo Cyclohexane (C6H12). Note it is impossible to place all the carbons in the same plane without straining the bonds. Take two opposite carbons and pull both of them up to make one conformation adn then pull one of them down to make the other conformation. Can you inercovert one conformer int othe other without breaking any bonds? Explain why these represent conformers and not isomers.1 F1 Q @ 2 F2 W Draw the two chair cyclohexane conformations for the compound shown below. How many substituents are axial in the less stable conformation? >> F10 #3 3 C/ "CI 00 01 02 03 A Moving to another question will save this response. 80 F3 F4 ㅎ... E S4 $ R % 5 F5 T MacBook Air F6 6 Y & 7 F7 U * 00 8 DII F8 ( 9 F9 ) 0 1 I PFor the following structural formula, pick the structure that accurately represents its MOST STABLE conformation. CH3 H₂Cl... Br Br Br H₂C O D. O B. O C. O A. CH3 A CH3 B CH3 ... Br 주 Br H3C C CH3 H3C CH3 DوCH H3C ۵- کلرو-۲- ایزوپروپیل سیکلو هگزانون 2 3.1: Draw the chain conformer of... 1a. Cyclohexane, label all the axial and equatorial hydrogens 1b. The most stable conformer of ethylcyclohexane 1c. The most sable conformer of trans-1-tert-butyl-3-methylcyclohexaneConsider 1,2-dimethylcyclohexane.Q: Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable?Classify the pairs of molecules as not the same molecule, structural isomers, diastereomers, enantiomers or identical. Circle any molecules that are not achiral (a) (b) (c) Br... H CI H H Br H H3C Br H. CI Br H Br CI I I Br" "H H Br H CH3 Cr BrSEE MORE QUESTIONS