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CHEM 240 Notes

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Summary

Introduction to stereo chemistry and essential examples that illustrates all the features in the study course.

SUPPLEMENTARY NOTES FOR STEREOCHEMISTRY
SOME IMPORTANT CONCEPTS IN STEREOCHEMISTRY
1. RELATIONSHIP BETWEEN SYMMETRY AND CHIRALITY
Asymmetric objects are chiral
Symmetric objects are achiral

2. RELATIONSHIP BETWEEN OBJECTS AND THEIR MIRROR IMAGES
Symmetric objects are superposable with their mirror images. They are one and the same.
Asymmetric objects are nonsuperposable with their mirror images. They are different objects.
In the case of molecules, chiral molecules and their mirror images are different molecules.
Chiral molecules and their mirror images are a kind of stereoisomers called enantiomers.

3. DEFINITIONS
Stereoisomers - Compounds that have the same molecular formula and the same connectivity, but different arrangement of the atoms in 3-dimensional space.
Stereoisomers cannot be converted into each other without breaking bonds..........................................

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