Is this a diastereomeric pair or enantiomers?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Is this a diastereomeric pair or enantiomers?

### Stereochemistry: Anti and Syn Addition

In organic chemistry, stereochemical relationships between substituents can be understood with concepts such as "anti" and "syn" addition.

#### Stereochemical "Anti"
- If bromine (Br) and hydrogen (H) are on opposite sides, the configuration is described as "anti".
- This is illustrated on the left side of the diagram, where Br and H are positioned on opposite sides of the carbon chain.

#### Stereochemical "Syn"
- If bromine (Br) and hydrogen (H) are on the same side, the configuration is referred to as "syn".
- This is shown on the right side of the diagram, where Br and H are on the same side of the carbon chain.

The diagram features two chain structures with Br substituents highlighted to indicate their relative positions:

1. **Anti Configuration (Left Side)**:
   - The Br atom is shown in a bold, dark shade.
   - H atoms (not shown) are understood to be on the opposite side relative to Br.

2. **Syn Configuration (Right Side)**:
   - The Br atoms are shown adjacent to one another on the same side relative to H atoms.

These configurations are crucial in understanding the outcomes of various chemical reactions and the spatial orientation of molecules in a three-dimensional space.
Transcribed Image Text:### Stereochemistry: Anti and Syn Addition In organic chemistry, stereochemical relationships between substituents can be understood with concepts such as "anti" and "syn" addition. #### Stereochemical "Anti" - If bromine (Br) and hydrogen (H) are on opposite sides, the configuration is described as "anti". - This is illustrated on the left side of the diagram, where Br and H are positioned on opposite sides of the carbon chain. #### Stereochemical "Syn" - If bromine (Br) and hydrogen (H) are on the same side, the configuration is referred to as "syn". - This is shown on the right side of the diagram, where Br and H are on the same side of the carbon chain. The diagram features two chain structures with Br substituents highlighted to indicate their relative positions: 1. **Anti Configuration (Left Side)**: - The Br atom is shown in a bold, dark shade. - H atoms (not shown) are understood to be on the opposite side relative to Br. 2. **Syn Configuration (Right Side)**: - The Br atoms are shown adjacent to one another on the same side relative to H atoms. These configurations are crucial in understanding the outcomes of various chemical reactions and the spatial orientation of molecules in a three-dimensional space.
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