How many elements are there

The atoms that would sterically interact with methyl group located axially are highlighted in pink color in the attached image.

Further Explanation:

The stereoisomer of a molecule that has same chemical formula and connectivity of bond but differs in the arrangement of the atoms in space is known as conformer. The rotation about the carbon-carbon single bond can lead to the formation of conformer of a molecule.

There are four conformers of cyclohexane molecule as follows:

• Chair conformation
• Boat conformation
• Twist boat conformation
• Half chair conformation

Chair conformation is considered as the best conformation of cyclohexane. The hydrogen in blue denote the axial positions and the hydrogen in pink denote equatorial positions. (Refer to the attached image)

The stable conformation is that in which the bulky groups such as hydroxyl, methyl, and nitro group occupy the equatorial positions while the relatively small groups such as hydrogen atoms occupy axial positions. The reason is that the axially placed substituents suffer more steric repulsion and that generates strain in the molecule. The strain leads to high energy and thus less stability.

While writing the chair conformation the bulkier groups are preferentially placed at equatorial positions. The conformation that has bulky group at equatorial position is more favorable than the conformation that has bulky group at axial position. The reason for the stability of the conformation is diaxial interactions.

1,3-diaxial interaction: The 1,3-diaxial interactions occur among the axial substituent present at 1 and 3 positions.

The conformation in the problem has axial substituent hydrogen and bromine at the two positions 3 and 3’ which lead to 1,3-diaxial strain in the molecule and makes it unstable. (Refer to the attached image)

Learn more:

1. Balanced chemical equation brainly.com/question/1405182

2. Oxidation and reduction reaction: brainly.com/question/2973661

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Conformation of cyclohexane  

Keywords: Cyclohexane, planar, chair conformation, axial positions, equatorial positions, steric repulsion, high energy, 1, 3-diaxial interaction, 1, 3-diaxial strain.

Final answer:

In a substituted cyclohexane, 1,3-diaxial interactions happen between groups on the same side of the ring but are two carbons apart. In this scenario, the hydrogen atoms on carbons 3 and 5 would interact with the methyl group, causing steric strain.

Explanation:

In a substituted cyclohexane compound, 1,3-diaxial interactions occur between groups that are on the same side of the ring but are two carbons apart. In this case, the question focuses on the steric interactions with the methyl group. Assuming that the methyl group is on carbon-1 of the ring, the hydrogen atoms on carbons 3 and 5 (both axial positions) on the same face of the ring would sterically interact with the methyl group in a 1,3-diaxial fashion. This steric interaction leads to steric strain, which destabilizes the compound and promotes a conformational flip to relieve this strain.

Learn more about Steric Interactions here:

brainly.com/question/31977809

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The substance that cannot be decomposed by a chemical change is: B. Copper

What is copper

Copper is an element, and elements cannot be broken down into simpler substances through chemical changes. Chemical changes involve the rearrangement of atoms in molecules, leading to the formation of new substances.

However, in the case of an element like copper, it is composed of only one type of atom (Cu), and it cannot be further broken down into simpler substances by a chemical reaction.

Read mroe on copper here brainly.com/question/26449005

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