Rules of the Day CH320M/328M

Featured Golden Rules of Chemistry: None today

1. For amides, pi delocalization overrides your prediction based on VSEPR and the N atom is sp2 hybridized because this allows for pi delocalization. Amides are important in biochemistry as the backbone of proteins, so it is worth noticing the special properties of this functional group.

2. Constitutional isomers are molecules with the same molecular formula but different connectivities between atoms.

3. To name alkanes according to IUPAC rules, you must memorize the alkane parent (main chain) names (Table 2.1) and alkyl group names (Tables 2.2 and 2.3). Then you must memorize the rules on the web handout, which explains all you need to know about alkane nomenclature. I apologize for all of the goofy names and this memorization, but there is no way around it as far as I know.

4. To get started, just pay attention to what the dude says: To name alkanes, number the groups so the first gets the lowest number, then list them alphabetically using "yl", followed by writing the parent chain ending in "-ane".

HOMEWORK:

Read: Sections 2.4-2.5 in the ebook textbook. This text is part of the Longhorn Textbook access program.

Take the Daily Quiz 5 before 10 PM tomorrow. Click here to access the quiz. These quizzes are designed to review the important material from today's lecture. Together, they will count as 5% of your final grade.

Continue working on the Homework Problem Set 2, due at 10 PM on Monday, September 12. Click here to access the Homework Problem Set 2. Note there are Aktiv Learning and Gradescope Questions, and you MUST DO BOTH.