CHE 1220 Lecture Notes - Lecture 4: Trigonal Pyramidal Molecular Geometry, Trigonal Planar Molecular Geometry, Trigonal Bipyramidal Molecular Geometry

• School: St. John's University
• Department: Chemistry
• Course: CHE 1220
• Professor: Eranda Maligaspe

Document Summary

The three dimensional shape of molecules gives rise to its essential chemical properties. Molecules adopt a shape that minimizes their energy. In many cases, it is possible to predict the geometry of a molecule simply by considering the repulsive energy of electron pairs. You can use this valence shell electron pair repulsion model (vsepr) to predict shapes and determine whether or not a molecule is polar. Scientists commonly use this model when they need to predict or estimate the shape of a molecule. These properties are important for such diverse things as chemical reactivity, drug efficacy, or recognition of a substrate by an enzyme. Use vsepr to determine the shape of a molecule. Distinguish spatial requirements of lone pair electrons vs. bonding pairs. Assign hybridization and bond angle to a molecule. Lewis structure, electronic structure, electron arrangement, and electron geometry are terms used to describe how the bonding and nonbonding electron pairs are positioned in a molecule.