Which conformer(s) below represents highest energy staggered conformation of 2- methylbutane? CH3 Н. H CH3 I H CH3 01 O 11 OI I and II O III H₂C H CH3 H II H CH3 H H CH3 III CH3 CH3

None

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Identify the most stable chair conformation of the most stable isomer of 1-ethyl-3-isopropylcyclohexane. 01 O HII ON OV III IV

What are the relative energy levels of the three staggered conformations of 2,3-dimethylbutane when looking down the C2-C3 bond? Me Me H Me Me Me Me Me. Me Conformation: 191 1ක් පුදා H Me Me Me H H H A B C Me A is the highest energy conformation and C is the lowest (energy level of B is in between the two) O A and B are equal energy, and C is the highest energy conformation A and B are equal energy, and C is the lowest energy conformation C is the highest energy conformation and A is the lowest (energy level of B is in between the two) O B is the highest energy conformation and C is the lowest (energy level of A is in between the two)

CH₂CH3 CH3 CH₂CI H3C - -H 毛光 C/CH2CH2OH H- -CH₂OH H3CH₂C H CH₂CH₂Cl Identical Compounds Conformations Constitutional isomers Diastereomers Enantiomers

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 D

2. Label the most and the least stable conformation of the three: CH3 Created withAWhbar 3. Draw the most stable conformation in Newman projection formula for: 2,3-dimethylbutane when looking down the bond C2-C3 H. H3C- 3 CH3 CH3 CH3 2,3-dimethylbutane

Which of conformations in the options is a correct conformation of the following molecule and has the lowest energy? O CH3 CH3 it CH3 H3C CH3 CH3 CH3 CH3 CH3 H3C CH3 CH3