On this page, we will explore Newman Projections for two different organic molecules. The Newman Projection is a way to visualize the stereochemistry of a molecule from a specific bond angle.---**Question (a):** Draw a Newman Projection of the following molecule, looking down the C3-C4 bond. Draw C3 in the front.**Molecule Diagram:**- The molecule depicted shows a chain with the following substituents: hydrogen (H), bromine (Br), and chlorine (Cl).**Newman Projection:**- The drawing on the right represents the Newman Projection looking down the C3-C4 bond. C3 is depicted as the front carbon, shown as a point where three lines (bonds) radiate outwards at 120° angles. Each bond connects to hydrogen (H), bromine (Br), or chlorine (Cl).- The back carbon (C4) appears as a circle with similar bonding to substituents, seen through the circle representing the back carbon.---**Question (b):** Draw a Newman Projection of the most stable and the least stable conformation of the following molecule. Label each.**Molecule Diagram:**- Depicted is a similar chain of carbons with hydrogen (H) and chloride (Cl) atoms bound to back and front carbons. **Detailed Descriptions:**- The first Newman Projection shows a staggered conformation, which is generally the most stable as it minimizes electron repulsion between substituents.- The second projection shows an eclipsed conformation, typically the least stable due to increased repulsion between adjacent atoms or groups attached to the carbons being examined.---By analyzing these Newman Projections, we gain insight into the rotational conformations and stability of organic molecules, crucial for understanding reaction mechanisms and molecular behavior.

Newman projection in alkane stereochemistry, describes the conformation of a chemical bond from…

Draw each of the following. (a) Draw a Newman Projection of the following molecule, looking down the C3-C4 bond. Draw C3 in the front. H Br CI (b) Draw a Newman Projection of the most stable and the least stable conformation of the following molecule. Label each H H. CI H H

Draw each of the following. (a) Draw a Newman Projection of the following molecule, looking down the C3-C4 bond. Draw C3 in the front. H Br CI (b) Draw a Newman Projection of the most stable and the least stable conformation of the following molecule. Label each H H. CI H H

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter20: Organic Chemistry

Section: Chapter Questions

Problem 4STP

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Concept explainers

Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.

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On this page, we will explore Newman Projections for two different organic molecules. The Newman Projection is a way to visualize the stereochemistry of a molecule from a specific bond angle.

---

**Question (a):** Draw a Newman Projection of the following molecule, looking down the C3-C4 bond. Draw C3 in the front.

**Molecule Diagram:**
- The molecule depicted shows a chain with the following substituents: hydrogen (H), bromine (Br), and chlorine (Cl).

**Newman Projection:**
- The drawing on the right represents the Newman Projection looking down the C3-C4 bond. C3 is depicted as the front carbon, shown as a point where three lines (bonds) radiate outwards at 120° angles. Each bond connects to hydrogen (H), bromine (Br), or chlorine (Cl).
- The back carbon (C4) appears as a circle with similar bonding to substituents, seen through the circle representing the back carbon.

---

**Question (b):** Draw a Newman Projection of the most stable and the least stable conformation of the following molecule. Label each.

**Molecule Diagram:**
- Depicted is a similar chain of carbons with hydrogen (H) and chloride (Cl) atoms bound to back and front carbons.

**Detailed Descriptions:**
- The first Newman Projection shows a staggered conformation, which is generally the most stable as it minimizes electron repulsion between substituents.
- The second projection shows an eclipsed conformation, typically the least stable due to increased repulsion between adjacent atoms or groups attached to the carbons being examined.

---

By analyzing these Newman Projections, we gain insight into the rotational conformations and stability of organic molecules, crucial for understanding reaction mechanisms and molecular behavior.

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