CHEM 210 Study Guide - Midterm Guide: Trigonal Planar Molecular Geometry, Acid Dissociation Constant, Equilibrium Constant

• School: U of M
• Department: Chemistry
• Course: CHEM 210
• Professor: Alison Narayan

Document Summary

Electrons can move from: non-bonding electron pairs to open shell atoms, multiple bonds to open shell atoms, non-bonding electron pairs to multiple bonds, multiple bonds to multiple bonds. For small ring systems with less than 8 atoms, it is not possible to draw 2 adjacent double bonds or a triple bond. Best features for stable resonance structures: closed shell electron configuration, minimize separation of charges (+) and (-, maximize number of covalent bonds, place (-) on electronegative atoms, (+) on electropositive atoms. But 1 overrides 4: never put (+2) or (-2) on a single atom; never put like charges on adjacent atoms. Vsepr # = # atoms attached to central atom + # localized electron pairs attached to central atom. Observable geometry with # of lone pairs : trigonal pyramidal, bent. One lone electron pair observable geometry is bent. Two lone electron pairs observable geometry not available. One lone electron pair observable geometry not available.