CHEM 1301 Chapter Notes - Chapter 7.1: Hydrogen Sulfide, Fluoride, Aufbau Principle

• School: University of Manitoba
• Department: Chemistry
• Course: CHEM 1301
• Professor: Sarrah Vakili

Document Summary

Electrons are responsible for bonds in a molecule. Using the orbital overlap model to explain the bonding in simple molecules. We will focus only on molecules whose steric numbers are 2, 3 and 4. Steric numbers 5 and 6 are omitted due to the recent publications. Lewis model shows the distribution of valence electrons in a molecule. Vsepr model provides a simple ways to predict molecular shape. Neither model says anything about the detailed nature of covalent bonds. These models specify nothing about the orbitals occupied by the bonding and lone pair electrons. Walter heitler, fritz london, john slater, and linus pauling proposed the first description of covalent bonding in terms of atomic orbitals. This is a quantum mechanical explanation of the distribution of electrons in bonds (cid:271)eyo(cid:374)d lewis"s a(cid:374)d vsepr"s (cid:373)odels a(cid:374)d is (cid:272)alled vale(cid:374)(cid:272)e bo(cid:374)d (cid:894)vb(cid:895) theory. Valence bond (vb) theory provides a method of calculations the numerical values of bond angles and bond lengths.