CHM1011 Lecture Notes - Lecture 5: Covalent Bond, Diamagnetism, Aufbau Principle
31 Jul 2018
School
Department
Course
Professor
Document Summary
In relation to these molecules, the homonuclear bond is between c-c, n-n and o-o. The c-h, n-h and o-h bonds are heteronuclear bonds. Molecular orbital theory model is particularly useful for predicting whether molecules will exist given the constituent atom"s electron configuration, the strength of covalent bonds and the magnetic properties of molecules. Molecular orbitals (mo"s) may be constructed by mathematically combining the atomic orbitals (ao"s) of each atom that overlap in a suitable manner (i. e. have suitable symmetry, similar energy). perties of electrons discussed earlier. Number of mo"s generated = the number of ao"s used. Combining two compatible ao"s results in an in-phase and an out-of-phase combination. Like all waves, atomic wave functions may constructively or destructively interfere. Bonding mo is formed (region of high electron density exists between nuclei) Anti-bonding mo (node of zero electron density between nuclei results in repulsion: the aufbau principle. "the aufbau principle" literally translates to "the building-up principle", and that"s exactly what we do.
