CHEM 1127Q Lecture Notes - Lecture 19: Lone Pair, Trigonal Bipyramidal Molecular Geometry, Trigonal Planar Molecular Geometry

• School: UConn
• Department: Chemistry
• Course: CHEM 1127Q
• Professor: Dr. Niluka Wasalathanthri

Document Summary

A bond angle is the angle between any two bonds that include a common atom, usually measured in degrees. A bond distance (or bond length) is the distance between the nuclei of two bonded atoms along the straight line joining the nuclei. Bond distances are measured in angstroms or picometers. Valence shell electron pair repulsion theory enables us to predict the molecular structure of a model based on the number of bonds and lone electron pairs. Vsepr model assumes that electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between those electron pairs by maximizing the distance between them. The electrons in the valence shell of a central atom form either bonding pairs or lone pairs. The electrostatic repulsion of these electrons is reduced when these electron pairs are as far from each other as possible. The arrangement of electron domains (both bonding and lone pairs) around the central atom.