lecture12 - Chem 1A Lecture 12: V a le n c e b o n d t h e...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Valence bond theory I Chem 1A Lecture 12:
Background image of page 1

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

View Full DocumentRight Arrow Icon
MC Web - some useful definitions N H H H ligands lone pair central atom Coordination number: number of ligands Steric number: number of ligands + lone pairs An atom that is only bound to one ligand has a steric number of one no matter how many lone pairs it has. This atom is not hybridized. Br H
Background image of page 2
MC Web - some useful definitions N H H H ligands lone pair central atom Coordination geometry: real shape of the molecule Electron geometry: shape of molecule counting all ligands and lone pairs.
Background image of page 3

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

View Full DocumentRight Arrow Icon
MC Web For each central atom, give the coordination number, steric number, electron geometry, and coordination geometry. B F F F F F Br F F F 3 coord. # steric. # coord. geo. e - geo. Sn Cl Cl 3 trigonal planar trigonal planar 2 3 trigonal planar bent 5 6 octahedral square pyramidal
Background image of page 4
Molecular shape and polarity Some (but not all) molecules with polar covalent bonds have a dipole moment.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Molecular shape and polarity
Background image of page 6
Molecular shape and polarity
Background image of page 7

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

View Full DocumentRight Arrow Icon
Molecular shape and polarity Dipole moment = 1.89 D Dipole moment = 0 D
Background image of page 8
Molecular shape and polarity Does this molecule have a net dipole moment? BrF 5 NH 3 CH 2 O BF 3 N H H H B F F F C O H H F F Br F F F Yes - lone pair on central atom Yes- lone pair on central atom Yes - only one polar bond No - polar bonds cancel
Background image of page 9

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

View Full DocumentRight Arrow Icon
Microwave ovens heat food by applying an oscillating electromagnetic field. Because water has a dipole moment, it quickly reorients to keep up with the field. O
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 36

lecture12 - Chem 1A Lecture 12: V a le n c e b o n d t h e...

This preview shows document pages 1 - 11. Sign up to view the full document.

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