CH 301 Chapter 3 notes part1

CH 301 Chapter 3 notes part1 - Chapter 3 part 1 VSEPR and...

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Chapter 3 part 1 VSEPR and VB theories VSEPR = V alence S hell E lectron R epulsion - bonds and lone pairs repel- keep them apart - determines the likely shape of a molecule - does not describe how the bonding occurs VB = V alence B ond - tries to explain how bonds form - predicts which orbitals / hybrid orbitals* are used - Hybrid orbitals created from s,p,d orbitals as required . - USING VSEPR THEORY: 1. Draw correct Lewis dot structure for molecule or ion 2. Count RHED around central atom. 3. Predict ELECTRONIC geometry: - shape including ALL RHED. - - keep lone pairs as far apart as possible 4. Predict MOLECULAR geometry: (‘shape’ of molecule) - lone pairs are “invisible” WHAT’S A RHED? REGION of HIGH ELECTRON DENSITY Any area where valence electrons are found. Look at the central atom of the molecule: SINGLE, DOUBLE, TRIPLE bonds AND lone pairs are EACH considered ONE RHED. USING VSEPR THEORY:
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CH 301 Chapter 3 notes part1 - Chapter 3 part 1 VSEPR and...

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