CHEM 10600 Lecture Notes - Lecture 5: Chemical Bond, Lewis Structure, Antibonding Molecular Orbital

• School: CUNY Hunter College
• Department: Chemistry
• Course: CHEM 10600
• Professor: Riz

Document Summary

The shape of molecules usually determines many physical and chemical properties. This is accomplished by the way the atoms are bonded. To make a molecular model, it is necessary to know the chemical formula and how the atoms fit together. Molecular shape is determined by two main model theories, the valence shell electron-pair repulsion (vsepr) model theory and the molecular orbital (mo) theory. The vsepr model helps predict the geometries of molecules formed from nonmetals. The structure around a given atom is determined principally by minimizing electron-pair repulsions. Bonding and nonbonding pairs around a given atom will be positioned as far apart as possible. For this lab, we will be using the computer program. Gaussian , which performs many chemical calculations related to molecular structure and dynamics. Gaussian program: to build and view molecular models of various elements and compounds. All observations were noted in the lab notebook. In part 1, we looked at the h 2 molecule.