Tell whether each of the compounds below is achiral (A), chiral (C) or meso (M).

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Tell whether each of the compounds below is achiral (A), chiral (C) or meso (M).

The image displays three structural diagrams of organic molecules, each with empty boxes beneath them, likely for educational labeling or identification exercises.

1. **First Structure (left):** 
   - This molecule is a cyclobutane ring with two methyl groups (CH₃) attached on adjacent carbon atoms. The bonds are represented using solid and dashed wedges indicating stereochemistry, with solid wedges indicating groups coming out of the plane and dashed wedges indicating groups going into the plane.

2. **Second Structure (middle):**
   - The diagram shows a cyclopentane ring with one methyl group (CH₃) and one thiol group (SH) attached to adjacent carbon atoms. Similar to the first structure, wedges indicate the three-dimensional orientation of the groups.

3. **Third Structure (right):**
   - This structure features a straight chain with two bromine atoms (Br) and one methyl group (CH₃) attached. The bromine atoms are on different stereocenters from the methyl group and another hydrogen atom (H). Again, solid and dashed wedges highlight the stereochemical configuration of the molecule, with the solid wedges denoting bonds coming out of the plane and the dashed wedges showing bonds going into the plane.

All three structures are common illustrations in organic chemistry, used to teach concepts related to stereochemistry and molecular geometry. The empty boxes below these diagrams suggest that the structures might be part of an interactive exercise, where students could be asked to fill in or identify certain elements or properties of each molecule.
Transcribed Image Text:The image displays three structural diagrams of organic molecules, each with empty boxes beneath them, likely for educational labeling or identification exercises. 1. **First Structure (left):** - This molecule is a cyclobutane ring with two methyl groups (CH₃) attached on adjacent carbon atoms. The bonds are represented using solid and dashed wedges indicating stereochemistry, with solid wedges indicating groups coming out of the plane and dashed wedges indicating groups going into the plane. 2. **Second Structure (middle):** - The diagram shows a cyclopentane ring with one methyl group (CH₃) and one thiol group (SH) attached to adjacent carbon atoms. Similar to the first structure, wedges indicate the three-dimensional orientation of the groups. 3. **Third Structure (right):** - This structure features a straight chain with two bromine atoms (Br) and one methyl group (CH₃) attached. The bromine atoms are on different stereocenters from the methyl group and another hydrogen atom (H). Again, solid and dashed wedges highlight the stereochemical configuration of the molecule, with the solid wedges denoting bonds coming out of the plane and the dashed wedges showing bonds going into the plane. All three structures are common illustrations in organic chemistry, used to teach concepts related to stereochemistry and molecular geometry. The empty boxes below these diagrams suggest that the structures might be part of an interactive exercise, where students could be asked to fill in or identify certain elements or properties of each molecule.
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