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The frequency factor and steric factor are both parameters that affect the rate of a chemical reaction. The frequency factor is related to the number of collisions between reactant molecules per unit time, while the steric factor accounts for the influence of molecular geometry and orientation on the reaction rate. Together, they determine how often reactant molecules collide in the correct orientation and with sufficient energy to overcome the activation energy barrier for the reaction to occur.
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What is the difference between steric and torsional strain?
Steric strain refers to the repulsion between atoms in close proximity due to their electron clouds overlapping, leading to higher energy and destabilizing the molecule. Torsional strain, on the other hand, is caused by eclipsed interactions between substituents on adjacent atoms in a molecule, creating potential energy due to the unfavorable alignment of bonds. Both can contribute to the overall energy and stability of a molecular conformation.
What are steric forces?
Steric forces are the noncovalent interactions between atoms or groups that arise from the repulsion of electron clouds due to their proximity. These forces are important in determining molecular shape, affecting molecular conformation, and influencing the stability of chemical compounds. Steric hindrance is a common consequence of these forces, which can impact the reactivity and behavior of molecules.
What is steric collision?
Steric collision is the physical interference that occurs when two molecules approach each other too closely due to their bulky groups or substituents. This results in repulsion between the electron clouds of the molecules, hindering proper binding or reaction. Steric effects play a crucial role in determining molecular shape, reactivity, and biological interactions.
Why s8 ring is non planar?
The sulfur atom in an S8 ring has a much larger atomic radius compared to carbon atoms in a benzene ring, resulting in greater steric hindrance. This leads to the S8 ring adopting a non-planar crown conformation to minimize repulsive interactions between the sulfur atoms.
Why polar groups prefer psi axial position than equatorial?
Polar groups prefer the axial position in cyclohexane because it minimizes steric hindrance with neighboring atoms, allowing for better overlap of orbitals and stabilizing the molecule. In the axial position, the polar group experiences less repulsion from other groups compared to being in the equatorial position, which leads to a more energetically favorable conformation.
