Location: Academic Organisations » OpenCourseWare Consortium » MIT OpenCourseWare » MIT 5.111 Principles of Chemical Science - Fall 2005

Lecture 13: Breakdown of Octet Rule

author:Sylvia T. Ceyer, Center for Future Civic Media
published: Feb. 10, 2009,   recorded: October 2005,   views: 193
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Description

I. Breakdown of Octet Rule

A. Odd number of valence electrons

1. Example 1: •CH3

2. Example 2: •NO

B. Octet deficient molecules

C. Valence shell expansion

1. Example 1: PCl5

2. Example 2: CrO4-2

3. Example 3: IF4-

II. Ionic Bonds – Classical Model and Mechanism

A. Harpoon Mechanism

B. Limitations of the model

C. Energy of Interaction vs. re

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Reviews and comments:

Comment1 Paul, September 19, 2009 at 10:04 p.m.:

As usual with this author's lectures, reference is made to slides that cannot be seen or they are too far out of focus and can't be read. My browser also shows no available slides to view in synchrony with the video. Also, a common failing in video lectures is the inability to hear questions from the audience.The professor definitely has my attention but there is a bit too much watching and not much student doing. It's like a course I took on a computer program that was presented as powerpoint slides as I sat with my back to my computer rather than a hands-on do this and that course.

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