Draw the product of each reaction, indicating the stereochemistry at any stereogenic centers.

Name: Problem 32, Chapter 9: Organic Chemistry
Uploaded: 2019-04-29T21:24:06-08:00
Duration: 3 min 23 s
Channel: Nima Gharibi
Description: Draw the product of each reaction, indicating the stereochemistry at any stereogenic centers.

Draw the product of each reaction, indicating the...

Key Concepts

Reaction Mechanisms

Reaction mechanisms detail the step-by-step process by which reactants transform into products. A solid grasp of mechanisms provides insight into how bonds are rearranged and how stereochemistry is controlled during a reaction, which is key when drawing reaction products with correct stereochemistry.

Stereogenic Centers

A stereogenic center, usually a carbon atom, is one that can give rise to stereoisomerism when it is bonded to four different substituents. Recognizing these centers is essential for determining the number and type of stereoisomers resulting from a chemical reaction.

Stereochemistry

Stereochemistry is the study of the three?dimensional arrangement of atoms within molecules. It is crucial for understanding how reactions occur in space, especially when the configuration of atoms affects the properties of the resulting compounds.

Reaction Prediction

This concept involves anticipating the outcome of chemical reactions based on the nature of reactants, reagents, and conditions. It requires an understanding of how bonds are formed and broken and how different functional groups interact, which is fundamental to foreseeing the structure of the product.

Transcript

00:01 Hello, today we're doing problem 9 .32, and this asks us to determine the product of these reactions, and specifically these reactions are epoxide ring openings with a strong nucleophile.

00:12 So there's two things that we need to consider when we're doing epoxide ring openings is number one, is our nucleophile strong or weak? so a strong nucleophile includes something that is going to be negatively charged.

00:25 So a negatively charged strong nucleophile will attack on the level.

00:30 Least substituted carbon.

00:33 However, a weak nucleophile will attack on the more substituted carbon.

00:38 So i'll show you what i mean by that in a second.

00:40 And number two, the number second thing we need to consider is that regardless of the nucleophile, whether it be strong, negatively charged your weak neutral, all the nucleophiles will attack on the opposite side of the epoxide.

00:54 So if the epoxy, for example, an a is coming out of the page, the nucleophile will attack from inside the page behind it.

01:04 So now let's go over how we would do this.

01:07 So we see that we have a strong nickel file negatively charged, and on one side of the epoxide, we have two substituents.

01:14 On the bottom side, we have only one substituent.

01:16 So right away, i know that my strong nickel file is going to attack on the least substituted to carbon, making a bond.

01:23 When you make a bond, you need to break a bond...

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