Classify the following molecules into chiral o achiral OH 9

Classify the following molecules into chiral o achiral OH 9. Draw an enantiomer of each of the following molecule: ?? SH H H2N 10. Draw a diastereomer of each of the following molecule: Br Br ? NH2 OH OH Br OH NH2 OH OH OH OH OH ???? OH NH2

The Correct Answer and Explanation is :

To classify the molecules as chiral or achiral, let’s first define the terms:

1. Chiral molecule: A molecule that lacks any symmetry and cannot be superimposed on its mirror image. Chiral molecules usually have at least one chiral center (a carbon atom bonded to four different groups).
2. Achiral molecule: A molecule that is superimposable on its mirror image, meaning it has symmetry (no chiral centers or it has a plane of symmetry).

The molecules you provided are described in a way that I will need to analyze. Since you’ve included an image link but I can’t view it directly, I’ll address the typical types of molecules based on the descriptions. Let’s break down your request:

1. Molecule with SH, H, H2N groups:

• If this molecule has a central carbon (C) bonded to four different groups (SH, H, NH2, and the other group not specified), it would be chiral because it has no symmetry and cannot be superimposed on its mirror image. This would be a typical chiral center.
• Enantiomer: An enantiomer of this molecule would differ in the configuration of the chiral center. If the original configuration is R, the enantiomer would have the S configuration (or vice versa), meaning the arrangement of the groups around the chiral center would be reversed.

1. Molecule with Br, Br, NH2, OH groups:

• If this molecule has two identical groups (Br and Br), it cannot be chiral, since having two identical groups would lead to a plane of symmetry, making it achiral.
• Diastereomer: A diastereomer of this molecule would have a different spatial arrangement of the groups, but not be a mirror image. For example, one diastereomer could have one hydroxyl group at a different position, or the NH2 group may be located differently on the molecule.

1. Molecule with OH, NH2, OH groups:

• If this molecule has a carbon with a similar substitution pattern (e.g., OH, NH2, OH), it may also be achiral, as this could lead to symmetry. There might not be any chiral centers if the molecule has symmetry.
• Diastereomer: A diastereomer would again be a molecule with the same formula but with a different spatial arrangement of the functional groups. For example, the OH and NH2 groups could be in different positions relative to each other.

To summarize:

• Chiral molecules have no symmetry and usually have a single chiral center.
• Achiral molecules have symmetry and cannot be chiral (e.g., molecules with identical substituents like two bromines).
• Enantiomers are non-superimposable mirror images, while diastereomers differ in their spatial arrangement but are not mirror images.

Without the exact structures, this explanation focuses on the general concepts of chirality and stereoisomerism, which are essential for classification.