chem 211 3 notes - VSEPR model Valence shell electron pair...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
VSEPR model Valence shell electron pair repulsion model extends lewis structure to a molecular model Electrons want to be as far apart as possible In naming molecules, only consider atoms themselves, not lone pairs Does not distinguish between single and multiple bonds With more than one central atom, consider bonding around each atom independently W/ lone pairs n m AX E used to identify different combinations of lone pairs and atoms attached to central atom lone pairs have stronger repelling effect than bonded pairs L-L> L-B> B-B Summary of VSEPR: - regions of high electron concentrations spread out to maximize separations (bonds, lone pairs) - bonds repel each other the same amount, regardless of single, double, etc - bonding around central atom is independent of whether there are more than one central atoms in a molecule - lone pairs continue to shape, but not to naming of shape - lone pairs repel more strongly, tend to compress bond angles lone pairs can go on axial plane or equatorial plane…go for plane w that produces lowest energy (repells fewer number of atoms) Polar molecules Polar molecues have have nonzero dipole movement, non polar molecules have no dipole
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/17/2009 for the course CHEM 211 taught by Professor Crane, b during the Fall '06 term at Cornell University (Engineering School).

Page1 / 3

chem 211 3 notes - VSEPR model Valence shell electron pair...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online