CHEM 1211 Lecture Notes - Lecture 7: 3 Ft Gauge Rail Modelling, Electronic Program Guide, Covalent Bond

• School: Northeastern University
• Department: Chemistry & Chemical Biology
• Course: CHEM 1211
• Professor: Leonel Murga

Document Summary

Valence bond theory and hybrid orbitals: vsepr does not address atomic orbitals, valence bond theory. Quantum mechanics-based theory of bonding that assumes covalent bonds form when half-filled orbitals on different atoms overlap. This mixing process is called hybridization: the resulting orbitals created in the hybridization process are called hybrid. Orbitals: the number of resulting orbital must be equal to the number of orbital that were mixed. Sigma bond--the bonds formed have their electronic density along the axis joining the two nuclei (cylindrical symmetry) A set of the three hybrid orbitals with trigonal planar orientation produced by mixing one s and 2 p obitals. Slightly lower in energy than sp2 hybrid orbitals. A covalent bond in which electron density is greatest above and below the bonding axis. Pi bonds have a nodal plance that passes through the nuuclei. A set of two hybrid orbitals with linear orientation produced by mixing one s and one p orbital.