strain_01 - Strain INTRODUCTION: Compounds can come in all...

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Strain INTRODUCTION: Compounds can come in all different arrangements and shapes. The arrangement of the different elements in the compound are influenced by the strain each element or compound experiences. A compound can experience three different types of strain: angular strain, torsional strain, and steric strain. Due to the interactions and repulsions between different molecules, a compound can consist of any, all, or none of these three strains. VOCABULARY: 1. Strain: When a molecule is less stable due to electron repulsion or when it is not in its ideal geometry. 2. Torsional Strain: When rotating a molecule around a bond, the torsional strain is the repulsion caused by the electrons in between different groups when they pass by each other. 3. Steric Strain: Strain caused by the electrons in between different groups. Steric strain cannot be lessened by rotating the molecule around a bond. 4. Angle Strain: Strain caused when the actual bond angles in the atoms of the molecule differ from the ideal bond angles of their geometry. There might be some confusion between torsional and steric strain; the difference is that “torsional strain can be relieved by bond rotation whereas steric strain connot” (Thinkbook pg. 25) TORSIONAL STRAIN: When a molecule is able to rotate around a sigma bond, there is bound to be different levels of torsional strain that vary with the placements of the substituents relative to each other. This leads to different conformations of
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strain_01 - Strain INTRODUCTION: Compounds can come in all...

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