Huckel's Rule: aromatic vs. antiaromatic (5)

Organic chemistry: How to use Huckel's Rule to determine whether a molecule is aromatic, antiaromatic, or nonaromatic.

These videos are offered on a "pay what you like" basis. You can pay for the use of the videos at my website:
http://www.freelance-teacher.com/videos.htm

For a list of all the available video series, arranged in suggested viewing order, go to my website.

These videos are designed to help students who are finding the material difficult, so I go very slowly, with lots of repetition and examples. If you don't find this material difficult, you might be very bored by these videos and might prefer to learn straight from a textbook.

Here is a playlist containing all the videos in this series:
http://www.youtube.com/watch?v=r9ZV_t16x0k&feature=PlayList&p=7E15BC1...

(1) The rule for determining hybridization
(2) The rule for determining hybridization, concluded
(3) The exception to the rule for determining hybridization
(4) What are the valence orbitals of hybridized atoms?
(5) "Flat", "cyclic", "completely conjugated"
(6) Counting pi electrons
(7) Counting pi electrons--harder problems
(8) Counting pi electrons--more problems
(9) Counting pi electrons--more problems
(10) Counting pi electrons--more problems
(11) Counting pi electrons--even more problems
(12) Counting pi electrons--rings with substituents
(13) Counting pi electrons--polycyclics
(14) Counting pi electrons--radicals; and a puzzle
(15) Counting pi electrons--triple bonds
(16) The lesson from triple bonds
(17) A deeper look: why do the rules work?
(18) A deeper look, continued
(19) A deeper look: Why is there an "exception to the rule" for hybridization?
(20) A deeper look: Why "flat"?
(21) A deeper look: Why "4n+2"? Molecular orbitals
(22) Why "4n+2"? Frost diagrams
(23) Why "4n+2"?
(24) Why "4n+2"?
(25) Why "4n+2"?


tags: education college student exam test

Category:

Education

Tags:

• huckel
• aromatic
• antiaromatic
• hybridization
• sp3
• sp2
• organic
• chemistry
• ochem
• education
• college
• student
• exam
• test

[PrinceVen]

wow, thank you so much for doing this! You are very clear and explain everything so well...awesome!

[snakeinapple]

you are amazing! A brilliant man!!

[Ayad92]

i think i learned more from him than my professor this whole semester! thanx

[lagoskid]

@hockeymo Carbocations are sp2

[hockeymo]

QUESTION: If you have a positive charge on a carbon (like the one at the end of the video) is it always sp2? I learned this awhile ago and I forget! thanks

[Thehamez]

As I always like to say, the smartest people are not the ones who know the most. They are the ones who can convey difficult topics in an understandable way.

[MsNatalieRose1]

@mrhansenable Although it doesn't have any lone pairs it is only attached to three atoms (two carbons and one hydrogen), which means there are three atomic orbitals (s, p, p), which is why it is sp2 hybridized.

[GCOOL75]

I wish my Orgo. chem... professor is good as this guy. lol

[kokocipher]

I can't believe my teacher made us memorize so many useless definitions for things =\.

[jlduong10]

@mrhansenable if it had two hydrogens then it'd have no charge on it. it's (from my knowledge) lacking an atom attachment, meaning the carbon is positively charged and sp2

[Mrinfinite79]

@mrhansenable I agree, I was confused at this part too. Wouldn't it have to be a negatively charged carbon to not a positively charge one?