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Questions A. - Line angle drawings are organic chemists’ shorthand for depicting

ID: 1012476 • Letter: Q

Question

Questions

     A. - Line angle drawings are organic chemists’ shorthand for depicting chains of atoms. The ends of the lines are -CH3 groups, while the vertices along the chain are -CH2 groups. For example, the molecule shown below is 2-methyloctane (C9H2O).

     - Is the line angle drawing of C9H2O shown below an isomer or conformer of the line angle drawing shown above? Use your modeling kit to help you answer this question as necessary.

    B. - Which Newman Projection shown below depicts a higher energy conformer, A or B? Think hard, this may be a trick question.

    C. - Are the Newman Projections shown below isomers or conformers? Explain your answer.

Questions Line angle drawings are organic chemists' shorthand for depicting chains of atoms. The ends of the lines are -CH3 groups, while the vertices along the chain are -CH2 groups. For example, the molecule shown below is 2-methyloctane (C3H2O). A. Is the line angle drawing of CoH2O shown below an isomer or conformer of the line angle drawing shown above? Use your modeling kit to help you answer this question as necessary. B. Which Newman Projection shown below depicts a higher energy conformer, A or B? Think hard, this may be a trick question. CI Cl CI C. Are the Newman Projections shown below isomers or conformers? Explain your answer. OCH3 CH2OH

Explanation / Answer

A.

2-methyloctane (C9H2O).

First the molecular formula you provide (C9H2O) is incorrect.

The line angle drawing of 2-methyloctane shown are identical structures. It even it cannot be termed as conformers. Since alkanes are flexible and it will twist at any angle.

B. Both the conformers are same and have same energy.

Two chlorine atoms are placed to each other by 60o.

C.

The two newman projectons are isomers. One is ether (first one) and second is alcohol, but both have same molecular formula.