AROMATIC ANTIAROMATIC NONAROMATIC PDF

Here, I have tried to hub three 03 time economic mnemonics by including two 02 formulae for the prediction of hybridization of hetero atom, aromatic and anti aromatic behavior of heterocyclic compounds. The conventional methods for determination of hybridization state of hetero atom planarity of molecule , prediction of aromatic and anti aromatic nature of heterocyclic compound is time consuming. Hetero atom atom containing lone pair of electron which is directly attached with single bonds only from all ends is to be considered as DLP containing hetero atom and its lone pair is to be treated as DLP. In Pyrrole lone pair of N atom is to be treated as DLP because it is directly attached with three single bonds only. Hetero atom atom containing lone pair of electron which is directly attached with single and double bonds with the ring system is to be considered as LLP containing hetero atom and its lone pair is to be treated as localized lone pair of electron LLP.

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Aromaticity is one of the more exciting topics in organic chemistry! Determine if each molecule below is Aromatic, Antiaromatic or Non Aromatic. Explain your reasoning. Need help? Review the first 2 videos in the Aromaticity Tutorial series. Which lone pairs if any in each molecule are aromatic and part of the resonating system?

Explain your answer. Find an error on the quiz or solutions? Let me know here!! The true key to successful mastery of alkene reactions lies in practice practice practice. However, … [Read More Click for additional cheat sheets.

Click for additional MCAT tutorials. Click for additional orgo tutorial videos. Review the first 2 videos in the Aromaticity Tutorial series Part 2: Aromatic Electrons Which lone pairs if any in each molecule are aromatic and part of the resonating system? Looking for more? Join the Study Hall! Filed Under: Aromaticity Tagged With: aromaticity , orgo practice quiz.

Organic Chemistry Video Series! Formal Charge Formula Shortcut You can't afford to waste precious exam time calculating formal charge. Click the image below to Learn my shortcut. Return to top of page.

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“Is This Molecule Aromatic?” Some Practice Problems

You can determine whether a ring system is aromatic, anti-aromatic, or non-aromatic by determining whether it meets certain conditions. To be aromatic, a molecule must meet the following four conditions:. In other words, no atom in the ring can be sp 3 hybridized. If the molecule meets the first three conditions, but only has 4 n pi electrons, the molecule is anti-aromatic. If the molecule fails any or all of the first three conditions, then the molecule is non-aromatic.

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17.5: Aromaticity and Huckel's Rule

In short, the only way aromatic and antiaromatic compounds differ is the number of electrons they have in the conjugated system. All the other criteria-being cyclic, planar and fully conjugated are a must for both categories:. There is also the third class of compounds we need to discuss: These are the nonaromatic or not aromatic compounds. As the name suggests, nonaromatic compounds have really nothing to do with the aromaticity well, almost. And that is the idea, nonaromatic compounds are the ones not related to the aromatic and antiaromatic compounds:. In fact, if any of these factors; cyclic, planar, fully conjugated does not match — the compound is said to be nonaromatic. Sometimes though, it may not be so obvious because some molecules look like they are aromatic or antiaromatic based on the factors mentioned above.

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Aromaticity Practice Problems for Aromatic, Antiaromatic, Nonaromatic

Antiaromatic Compounds and Antiaromaticity. Our last post in this series on aromaticity went through the 4 conditions a molecule must fulfill in order to be aromatic. In that post we tried to explain what each of those rules meant — so if any of these individual items seem unclear to you, it might be a good idea to go back to that post. Make a table. You need to know the few exceptions that come up — we covered that last time.

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Antiaromatic Compounds and Antiaromaticity

Aromaticity is one of the more exciting topics in organic chemistry! Determine if each molecule below is Aromatic, Antiaromatic or Non Aromatic. Explain your reasoning. Need help? Review the first 2 videos in the Aromaticity Tutorial series. Which lone pairs if any in each molecule are aromatic and part of the resonating system?

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