40. An E2 reaction can occur from which conformer? CH3 OTS H. OTS H. LOCH3 (A) H₂CO (B) H H CH3 CH3 CH3 OTS CH3. H3C. H H H3CO CH3 (D) (C) H CH 3 H3CO H H OTS
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- a model of cyclohexane in a chair conformation, and explain why the names “axial” and“equatorial’ are appropriate.A7. Which of the following molecules represents the most stable conformation of cyclohexanol? A В C ОН HO- HO. ОН40. An E2 reaction can occur from which conformer? CH3 OTS H. OTS H. LOCH3 (A) H₂CO (B) H H CH3 CH3 CH3 OTS CH3. H3C. H H H3CO CH3 (D) (C) H CH 3 H3CO H H OTS
- 7. Which one of the following conformations of disubstituted cyclohexanes is expected to be the most stable? H,C CH, - CH3 A) B) CH3 CH3 CH, D) CH, CH, OB OD5. Draw the most stable chair conformation of the given trisubstituted cyclohexane? BrWhich of (a)-(d) is the most stable conformation? CH3 H- H CH2CH3 CH3 a) CH3 CH3YYH H CH2CH3 b) CH3 CH3 H CH2CH3 c) H3C H CH CH,CH3 H d)
- Which chair represents the most stable conformation of Molecule A? A B b D d E e Molecule A Me ..Me 'Me Ме Chair conformations Me a) Me b) c) Me Me Me Me Me Me- -Me Me Ме Me d) Ме e) Ме Me Me- Ме Me Me MeWhich conformer of pentane is the least stable? CH2CH3 CH,CH3 CH,CH, CH3 HCH,CH; CH H. H H. CH3 H. H. CH3 II III IV Select one: O IV O II1E.) Which of the following two conformers is lower in energy? Both conformers are of equal enery O A Conformer A is lower in energy. B Conformer B is lower in energy. It cannot be determined
- What is the most stable chair conformation of the 4-methoxy-1,2- dimethylcyclohexane structure given below? A a B b с с D d OCH: "CH3 H3C 4-methoxy-1,2-dimethylcyclohexane OCH: OCH3 H3C H3C- H3C- OCH3 H3C -OCH3 ĆH: CH3 CH3 CH3 A B DDraw the two chair conformations of the following trisubstituted cyclohexane. ndicate which of the two conformations is the most stable. OH Fl. ""CH3 ClDraw the most stable chair conformation of the following cyclohexane. //1 pomen