CHE 131 Study Guide - Final Guide: Linus Pauling, Lz 3, Valence Electron
Document Summary
Chemical / physical properties related to molecular shape. Molecules have 3 dimensional structure that determines activity. Biomolecules interact with particular molecules + shapes that fit into the active site. Lewis structures atoms + bonds , butnot 3d. Molecular models orientations and bond angles ; physiochemical properties. Vsepr theory predicts arrangement of valence electron pairs around a central atom . Electron pair geometry 3 dimensional arrangement of bonding electron pairs. + lone pairs electrons around a central atom. Molecular geometry 3d arrangement of atoms in a molecule. Determine electron pair geometry: draw lewis structure, determine steric , determine optimal spatial arrangement of electron pairs. Valence bond theory / linus pauling) quantum mechanics - based model. Covalent bond = overlap of lz filled orbitals. Sigma (o) covalent bond ; highest electron density between 2 atoms along bond axis. Hybridization mixed atomic orbitals; form covalent bonds with other atoms pi 11t) bond covalent; electron density is greatest around the bonding axis.
