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Chemical Bonding Chpt. 4 of text
Lewis Theory • We cannot “see” a chemical bond • Theoretical picture of a bond based on experiment
Hybrid Orbitals • Problem: Experiment shows Methane (CH4) has 4 identical bonds, even though…
A sigma (σ) bond is created by the end-to-end overlap of atomic orbitals
A pi (π) bond is created by the side-by-side (or parallel) overlap of atomic orbitals, usually p orbitals
VSEPR • Ronald Gillespie co-created VSEPR theory. He worked at McMaster in Hamilton. • VSEPR: valence-shell-electron-pair-repulsion theory (pronounced “vesper”)