CHEM 130 Chapter Notes - Chapter 4: Diamagnetism, Antibonding Molecular Orbital, Paramagnetism
Document Summary
The three-dimensional arrangement of the atoms in a molecule. Valence shell electron pair repulsion (vsepr) model. Useful in predicting the geometries of molecules formed from nonmetals. The structure around a given atom is determined principally by minimizing electron-pair repulsion. The binding and non-bonding pairs around a given atom will be positioned as far apart as possible. Draw lewis dot structure for the model. Count the electron pairs and arrange them in the way that minimizes repulsion. Determine the positions of the atoms from the way electron pairs are shared. Determine the name of the molecular structure from the positions of the atoms. For the vsepr model, multiple bonds count as one effective electron pair. When a molecule exhibits resonance, any one of the resonance structures can be used to predict the molecular structure using the vsepr model. 120 degree angles provide lone pairs with enough space so that distortions do not occur.
