Starting from the structure below (sighting down the indicated bond). rotate the back carbon to provide an eclipsed conformer of the structure. Ph H H Hill CH₂CH3 H Draw Newman Projection
Introduction to Organic Chemistry
The field of chemistry which deals with the studies of reactions, structures, and properties of organic compounds that comprise carbon bonded through covalent bonding is organic chemistry. The studies regarding the structure of organic compounds could be determined with the help of structural formulas. In order to know about the behavior of organic compounds, a study on the properties has to be done. Both physical properties and chemical properties, the origin of chemical reactivity come under the study regarding the properties of organic compounds. The chemical preparation of polymers, drugs, natural products, and the study of separate organic molecules in the lab come under the study of organic reactions.
Vinyl Group
Vinyl group is the name given to the functional group of -CH=CH2. It can be seen as an ethene molecule with one less hydrogen in number. Hence it is also called as ethenyl group at times.
Straight Chain Hydrocarbons
The requirement to identify each compound needs a richer number of words than informative prefixes like n and iso. The identification of organic molecules is made easier by the use of systematic nomenclature schemes. The organic chemistry nomenclature has two types: traditional and systematic. Common names arise in many forms, but share the characteristic that a link through name and form is unnecessary. The name that matches a certain structure clearly must be remembered as knowing a person's name. In contrast, systemic names, including an overall common set of laws, are locked specifically to the chemical structure.
Unsaturated Hydrocarbon
Following are few examples of alkenes with their general molecular as well as their structural formulas:
Conjugated Compounds in Organic Chemistry
The delocalization of electrons in a molecule is called conjugation in organic chemistry. This delocalisation process of electrons leads to the shortenings or elongations of chemical bonds, but at the same time it causes changes in the chemical properties in conjugated molecules as compared to the non-conjugated ones. For example, conjugated molecules absorb light at longer wavelengths.
Alpha Carbon And Alpha Protons
The carbon directly attached to the functional group in an organic molecule is referred to as the alpha carbon and the hydrogen attached to an alpha carbon are termed as the alpha hydrogens or alpha protons. These alpha carbon atoms and alpha hydrogen atoms are of importance because they undergo certain characteristic reactions in organic chemistry.
![### Understanding Conformational Analysis: Newman Projections
#### Objective:
Using the provided molecular structure, rotate the back carbon around the indicated bond to achieve an eclipsed conformer of the molecule. Draw the resulting Newman Projection in the space provided.
#### Steps and Explanation:
1. **Identify the Indicated Bond:**
The structure shows a specific bond, illustrated with a dashed line and arrow, that you will sight down to draw the Newman Projection.
2. **Understanding the Newman Projection:**
A Newman Projection is a method to visualize the conformation of a molecule from a specific vantage point along a carbon-carbon bond axis. This type of illustration helps in analyzing the spatial orientation of substituents around the two carbons involved in the bond.
3. **Rotation to Eclipsed Conformation:**
In this task, you will rotate the atoms attached to the back carbon (the carbon farther from your viewpoint) such that their bonds directly overlap with the bonds of the atoms attached to the front carbon (the carbon closer to your viewpoint). This overlapping alignment is known as the eclipsed conformation.
4. **Structure Analysis:**
- **Front Carbon Substituents:**
- Phenyl group (Ph)
- Two hydrogen atoms
- **Back Carbon Substituents:**
- Ethyl group (CH2CH3)
- Two hydrogen atoms
#### Diagram:
1. **Sight Down the Indicated Bond:**
From the diagram, you can visualize how the substituents are arranged around the carbon atoms.
2. **Eclipsed Conformer:**
To draw the Newman Projection:
- The front carbon atom will have the Phenyl group and two hydrogen atoms.
- The back carbon atom will have the Ethyl group directly behind the Phenyl group and two hydrogen atoms directly behind the hydrogen atoms of the front carbon.
3. **Draw the Newman Projection:**
- In the space provided, sketch two circles representing the front and back carbon atoms.
- Label the substituents ensuring that the positions for the back carbon directly overlap with those of the front carbon to represent the eclipsed conformation.
**Note:** Newman Projections are a valuable tool for chemists to study the steric interactions and understand the stability of different conformers in organic molecules.
#### Tasks:
- **Rotate the Back Carbon:**
Move the substituents into the eclipsed position.
- **Draw the](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F468a1036-9eac-47e7-b3af-5f844e8c7d46%2Fd75bde12-fff7-447a-aa96-f07453b57876%2Fxfjxfk_processed.jpeg&w=3840&q=75)
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