CH 101 Lecture Notes - Lecture 7: Valence Bond Theory, Lewis Acids And Bases, Paramagnetism

• School: University of Alabama
• Department: Chemistry
• Course: CH 101
• Professor: John Mc Duffie

Document Summary

Lewis theory says it shouldn"t be paramagnetic. Lewis theory generally predicts trends in properties, but it does not give good numerical predictions. Lewis theory gives good first approximations of the bond angles in molecules, but it usually cannot be used to get get the actual angle. Lewis theory cannot write one correct structure for many molecules where resonance is important. Lewis theory often does not predict the correct magnetic behavior of molecules. Bonds between atoms should occur when the orbitals on those atoms interacted to make a bond. The kind of interaction depends on whether the orbitals align along the axis between the nuclei or outside the axis. The valence electrons of the atoms in a molecule reside in quantum-mechanical atomic orbitals. The orbitals can be the standard s, p, d, and f orbitals, or they may be a hybrid of these.