Let's solve the problem step-by-step: --- ## **Step 1: Understanding the Question** We are asked which **Newman projection** corresponds to the given structure. The question points to the **C-C bond** (the one with Br, Cl, and D on the front carbon, and H, D, OH on the back carbon). --- ## **Step 2: Identify the "Front" and "Back" Carbons** - The arrow points **down the C-C bond**. - **Front carbon (closest to you in the projection)** has: Br, Cl, D. - **Back carbon (farthest from you)** has: OH, D, H. --- ## **Step 3: Assign Groups Correctly** Let's label: - **Front carbon:** Br (up), Cl (left), D (right). - **Back carbon:** OH (up), D (left), H (right). --- ## **Step 4: Draw the Newman Projection** In a Newman projection: - **Front carbon:** Draw a dot, with three bonds radiating out. - **Back carbon:** Draw a circle behind the dot, with three bonds radiating out behind. Using the structure: - **Br** is pointing up (front carbon). - **Cl** is left (front carbon). - **D** is right (front carbon). - **OH** is up (back carbon). - **D** is left (back carbon). - **H** is right (back carbon). --- ## **Step 5: Match to the Choices** Now, compare this arrangement to each of the options: - The **front groups** (from the dot) should be: Br (up), Cl (left), D (right). - The **back groups** (from the circle) should be: OH (up), D (left), H (right). Look carefully at the diagrams: ### **Option a** - Front: Br (up), Cl (left), D (right) - Back: OH (up), D (left), H (right) This matches our arrangement! ### **Options b, c, d** - The other options do **not** have the correct arrangement of groups. --- ## **Step 6: Final Answer** ### **The correct answer is:** **a** --- ## **Summary Table** | Option | Front Carbon | Back Carbon | Matches? | |--------|--------------|-------------|----------| | a | Br, Cl, D | OH, D, H | Yes | | b | ... | ... | No | | c | ... | ... | No | | d | ... | ... | No | --- ### **Final Answer: Option a** --- **Let me know if you want more explanation about how Newman projections work!**