1 - Molecular Models

1 Molecular Models - Molecular Models Beyond Lewis Dot Structures Molecular Structure& Bonding A molecular structure unlike a simple molecular

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Molecular Models Beyond Lewis Dot Structures Molecular Structure & Bonding A molecular structure, unlike a simple molecular formula, indicates the exact 3- D nature of the molecule. It indicates which atoms are bonded to which atoms, and the 3-D orientation of those atoms relative to each other. Molecular Structure Two issues: What is stuck to what? (Lewis Dot Structure) How are they oriented? (3-D Model) Two BIG Rules 1. Total # of valence electrons – the total number of valence electrons must be accounted for, no extras, none missing. 2. Octet Rule – every atom should have an octet (8) electrons associated with it. Hydrogen should only have 2 (a duet). Total Number of Valence Electrons The total number of available valence electrons is just the sum of the number of valence electrons that each atom possesses (ignoring d-orbital electrons) Using SO 4 2- as an example, what is the total number of valence electrons? Sulfur is a 3s 2 3p 4 valence – 6 valence electrons Oxygen is a 2s 2 2p 4 valence – 6 valence electrons SO 4 2- S = 6 e- 4 x O = 4 x 6 e- = 24 e- 2- = 2 extra electrons Total valence electrons = 6 + 24 + 2 = 32 electrons Drawing Lewis Dot Structures 1. Determine the total number of valence electrons. 2. Determine which atom is the “central” atom. 3. Stick everything to the central atom using a single bond. Central Atom In a molecule, there are only 2 types of atoms: 1. “central” – bonded to more than one other atom.atom....
View Full Document

This note was uploaded on 04/17/2008 for the course CHEM 1011.216.0 taught by Professor Joelanzafame during the Winter '07 term at RIT.

Page1 / 27

1 Molecular Models - Molecular Models Beyond Lewis Dot Structures Molecular Structure& Bonding A molecular structure unlike a simple molecular

This preview shows document pages 1 - 10. Sign up to view the full document.

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