Chemistry 104

First year course in chemistry at Bryn Mawr College. Lecture summaries, interesting chemistry, podcasts and webcasts.

Tuesday, February 09, 2010

A test of the emergency lecturing system

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Wednesday, February 01, 2006

Lecture Summary: February 1

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We briefly reviewed formal charge, then examined how oxidation numbers as an alternative scheme for deciding how the electrons (charge) is d...
Tuesday, January 31, 2006

Weird Words of Science: The Ties that Bind

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Many transition metals react with bases (such as ammonia) to produce beautifully colored transition metal-ligand complexes. The word ligand...

Weird Words of Science: Tooth and Claw - Chelation

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There has been a lot news coverage lately about the abuse of chelation therapy for treating autism and other disorders. So what's a ch...
Monday, January 30, 2006

How to look like a chemist: Drawing chemical structures

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Chemists often don't show all the hydrogen atoms in a molecule, since they can clutter up the picture (and often aren't involved in ...

How to talk like a chemist: Hydroxide, hydroxyl? Aren't they the same thing?

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The glucose molecule shown at left has lots of OH's on it. Are these hydroxides ? Technically, no. Hydroxides are ions, individual OH...
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Lecture Summary 1/29: Formal Charges & Redox

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We discussed how formal charges are a useful predictive tool, particularly for organic compounds. The charges are not real, in the sense th...
Friday, January 27, 2006

Example Problem 2: Nucleophiles/Electrophiles and Penicllin

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Penicillin was one of the first antibiotics in wide use. It was discovered in the late 19th century by a French medical student (Ernest Duc...

Lecture Summary 1/27: The ties that bind - metal/ligand interactions

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Our understanding of inorganic reactions also benefits from considering Lewis acid/base interactions. The ligand in a metal complex is acti...

Lecture Summary 1/25: The 'basics' of organic chemistry - nucleophiles and electrophiles

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Many organic chemistry reactions can be understood in terms of nucleophiles (molecules with lone pairs in search of partial positive charges...
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