geom - MOLECULAR GEOMETRY OR MOLECULAR SHAPE The...

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

View Full Document Right Arrow Icon
MOLECULAR GEOMETRY OR MOLECULAR SHAPE The determination of molecular shape involves determining BOND ANGLES. We are going to use a very simple theory of molecular shape which only requires Lewis electron dot structures and simple electrostatic ideas; this is called Valence Shell Electron Pair Repulsion Theory (VSEPR) This approach to molecular shape involves the following steps: A. Determination of the Central Atom The central atom is defined as the atom around which all the other atoms are arranged: Sometimes clearly identified by the stoichiometry e.g. NH 3 ; PCl 5 F is very rarely a central atom; Cl, Br, and l are never central atoms unless bonded to another halogen or oxygen O is not usually central unless bonded to TWO other atoms e.g. H 2 O; OF 2 H is never a cental atom B. Determination of the Number of Valence Electrons Surrounding the Central Atom Draw the Lewis electron dot structure for the molecule Determine the number of valence electrons around the central atom
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.

Page1 / 2

geom - MOLECULAR GEOMETRY OR MOLECULAR SHAPE The...

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