Saturday, June 04, 2005

Lecture 039: rest of problems chap 9

The rest of the problems for chap 9 have been uploaded in WebCT. (probs 27, 36, 37).

Thursday, May 19, 2005

Lecture 038 vodcast

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Lecture 038: second exam review session

Here is a second review session for the final exam.
NOTE: CHAP 9 WILL BE ON THE EXAM - IGNORE INITIAL COMMENTS IN THIS POST

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Lecture 038 pdf

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Lecture 037: exam review 1

Here is the first review session for the final exam.

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Lecture 037 pdf

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Lecture 036 vodcast

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Lecture 036: chap 9 problems

The solutions to problems for Chap 9 (alkynes) are posted in WebCT.

Lecture 035: alkynes

This lecture covers the basics of alkyne nomenclature, synthesis and reactions.

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Lecture 035 vodcast

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Lecture 034: review for test2 make-up

Here is the review session for the make-up of test 2, covering chapters 5-8.

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Lecture 034 vodcast

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Lecture 034 pdf

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Lecture 033: test 2 review

Here is the review session for test 2, covering chapters 5-8.

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Lecture 033 vodcast

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Lecture 033 pdf

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Lectures 031 and 032 chap 8 problems

Chap 8 problem solutions are posted in WebCT.

Sunday, May 15, 2005

Lecture 030: Alkenes 3

This lecture covers the rest of the alkene reactions starting at the anti-Markovnikov addition of HBr.

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Lecture 030 vodcast

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Monday, May 09, 2005

Lecture 029: Alkenes 2

This lecture covers reactions of alkenes.

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Lecture 029 vodcast

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Lecture 028: Chap 7 problems

The solutions to the alkene preparation problems are up in WebCT.

Lecture 027: Alkenes 1

The introduction to alkenes, nomenclature and preparation.

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Lecture 027 vodcast

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Lecture 024-025: Chap 6 problems

The solutions to the alkyl halide problems are up in WebCT.

Lecture 023: Alkyl Halides 3

A very short final part of Alkyl Halides doing one E-1 and one E-2 example

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Lecture 023 vodcast

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Monday, May 02, 2005

Lecture 022: Alkyl halides part 2

I start with the solvent effects in SN1 and SN2 reactions then the rearrangement of carbocations in SN1 reactions by 1,2-shifts. The detailed mechanism of E-1 and E-2 reactions is covered.

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Lecture 022 vodcast

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Lecture 021 Alkyl halides part 1

I start with alkyl halide nomenclature then an overview of preparation and reactions.
Introduced SN1 and SN2 reaction mechanisms.

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Lecture 021 vodcast

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Lectures 019 and 020 probs chap 5

Solutions to the problem set for Chap 5 are now available in WebCT.

Friday, April 29, 2005

Lecture 018: Chirality part 3

This lecture first looks at assigning R and S nomenclature to molecules with multiple chiral centers. Then we explore reactions involving chiral centers, at a chiral center and next to a chiral center.

In the first few minutes I solve problem 4-39e.

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Lecture 018 vodcast

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Wednesday, April 27, 2005

Lecture 017: Chirality part 2

This lecture explains how to assign R and S to chiral centers and looks at molecules with more than one chiral center, leading to diastereomers and meso isomers.

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Lecture 017 vodcast

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Lecture 016: Chirality Intro

This is an introduction to chirality showing first how to create an enantiomer by putting 4 different groups on an sp3 hybridized carbon. Properties of enantiomers are discussed.

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Lecture 016 vodcast

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Sunday, April 24, 2005

Lecture 015b: Test 1 makeup review

This is a review session to prepare for the make-up of test 1. This is from another term so, as usual, ignore any comments referring to dates or to the policy on the make-up grade. I will use the better score between the test and make-up.

If you are an online student remember to email me questions or request a study session on a specific topic.

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Lecture 015b vodcast

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Saturday, April 23, 2005

Lecture 015a: Review for test 1

This is a review session to prepare for test 1. This is from another term so, as usual, ignore any comments referring to dates. This term we didn't really have any questions that were not already answered in the problem set.

If you are an online student remember to email me questions or request a study session on a specific topic.

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Lecture 015a vodcast

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Lecture 15a pdf

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Friday, April 22, 2005

Lecture 015: solutions to chap 4 problems

The free radical halogenation problem solutions are available in WebCT.

Lecture 015 pdf

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Thursday, April 21, 2005

Lecture 014: Free Radical Reaction Part 2

Here is the second part to the free radical halogenation reaction. Learn how to determine the major and minor products from the reaction of halogens with alkanes.

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Lecture 014 vodcast

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Tuesday, April 19, 2005

Lecture 013 vodcast

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Lecture 013: Free Radical Reaction Intro

Here is an introduction to the free radical halogenation reaction. The full muchanism of the reaction of Br2 with methane in the presence of light is used as an example.

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Lecture 013 pdf

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Monday, April 18, 2005

Lecture 012: problem solutions chap 3 part 2

The solutions to problems 42-44 in Chapter 3 are now available in WebCT. I also made the video available as Flash. Let me know how it compares to the Real format, which should be available within 36 hours of the lecture. You have to scroll down to see the controller for the Flash presentation.

At the end of the lecture I reported that, since the responses I received so far have been positive for meeting up in smaller groups, there will be no lecture in Disque starting Wednesday. Students who email me review topics will be directed to a location and time slot for meetings. It looks like the first requests are all for Newman projections.

The lectures for the rest of the term will be uploaded shortly, as well as all previous lectures in Flash format.

The first test covers Chaps 1-4.

Friday, April 15, 2005

Lecture 011: problem solutions chap 3 part 1

The solutions to problems 33-34 in Chapter 3 are now available in WebCT. I also made the video available as Flash. Let me know how it compares to the Real format, which should be available within 36 hours of the lecture. You have to scroll down to see the controller for the Flash presentation.

Lecture 010: cycloalkanes

We finished up Newman projections with butane. Cycloalkanes were covered, including determining the more stable conformation of cyclohexane derivatives.

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Lecture 010 vodcast

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Wednesday, April 13, 2005

Lecture 009: problem solutions Chap 2 Part 2

The solutions to problems 37-42 in Chapter 2 are now available in WebCT. I also made the video available as Flash. Let me know how it compares to the Real format, which should be available within 36 hours of the lecture. You have to scroll down to see the controller for the Flash presentation.

Monday, April 11, 2005

Lecture 008: problem solutions chap 2 part I

The solutions to problems 27-35 in Chapter 2 are now available in WebCT. I also made the video available as Flash. Let me know how it compares to the Real format, which should be available within 36 hours of the lecture.

Friday, April 08, 2005

Lecture 007 vodcast

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Lecture 007: Alkane Introduction

We finished up intermolecular forces and predicting relative boiling points and solubility. Functional groups were introduced. Looked at the first ten alkanes then reactions of alkanes and Newman projections for ethane and propane.

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Lecture 007 pdf

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Wednesday, April 06, 2005

Lecture 006: Problems

The solutions for the first chapter problems can be found in WebCT. The screencast link should be up within 24 hours of the class recording.

Monday, April 04, 2005

Lecture 005: Molecular Orbitals and Polarity

We finished up molecular orbitals with the sp hybrid in acetylene and looked at predicting molecular shape from hybridization. We examined the rigidity of double bonds leading to geometrical isomers (in contrast to constitutional isomers). Polar and non polar molecules were analysed based on the summation of their polar bonds.

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Friday, April 01, 2005

Lecture 005 vodcast

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Lecture 005 pdf

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Lecture 004 vodcast

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Lecture 004: More Lewis Structures and Molecular Orbitals

We continued with examples of Lewis structures: SO2, SO3, N3-, H2SO4, N2O. We just worried about getting the right number of bonds and lone pairs, not the geometry of the molecules. In order to look at geometry we need to look at molecular orbitals. The formation of sp3 and sp2 hybrid orbitals was demonstrated for CH4 and CH2=CH2, respectively.

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Wednesday, March 30, 2005

Lecture 003 vodcast

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Lecture 003: Lewis Structures

We reviewed the Lewis Dot structures of H2, F2, O2, N2, CH4, CO2, BF3, NH3, CO and SO. And then the fire alarm went off and we had to rush out.

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Lecture 002: Electronic Configuration

We reviewed the electronic configuration of the first 10 elements using the Pauli Exclusion Principle and Hund's Rule. Introduced covalent and ionic bonding.

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Tuesday, March 15, 2005

LEWIS DOT APPROACH TO MOLECULAR STRUCTURE

LEWIS DOT APPROACH TO MOLECULAR STRUCTURE

Predicts geometry, polarity, basicity, etc.
ONE COVALENT BOND = 2 SHARED ELECTRONS
1) Count total number of electrons available (by the row in the periodic table, e.g. C=4, N=5, O=6, F=7, Ne=8)
2) Find out how many electrons are needed: 8 for each C,N,O,F and related elements 2 for H
3) [(2)-(1)] / 2 = number of bonds in the molecule
4) After placing bonds, complete octets
5) Count electrons around atoms and place charges
6) Make sure total charge, total number of electrons and octets work out

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