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Professor Dave Explains
Stereospecificity vs. Stereoselectivity and Regiospecificity vs. Regioselectivity
Many organic chemistry students think that specificity and selectivity are essentially synonymous when describing the potential products of a chemical reaction. But this is not true! They have separate meanings and imply different...
Professor Dave Explains
Peterson Olefination
Next in the series of olefination reactions is the Peterson olefination. This uses alpha-halo silanes and is quite fascinating, with a number of unique advantages. Namely, the stereochemistry of the alkene product can be controlled by...
Sophia Learning
Sophia: Cognitive Theory: Lesson 3
In this lesson you will learn about the mechanisms of cognitive theory, a perceptual theory of communications. It is 3 of 4 in the series titled "Cognitive Theory."
Khan Academy
Khan Academy: Student Story: Prioritizing Size/selectivity/diversity/financial
Listen to a student describe their college search process and what helped him decide on a school. [0:40]