14.6a Fragmentation Patterns of Alkanes, Alkenes, and Aromatic Compounds | Organic Chemistry

[@lspivzz5465]

I started skipping lectures in my orgo class about halfway through the semester and exclusively watched your videos and read my textbook. Pulled an A in orgo I, taking orgo II this semester and plan to do the exact same! You're basically my professor at this point. Thank you sir.

[@ChadsPrep]

Glad you found the channel!

[@jlop4383]

Mr. Cleans Prodigy who became a chemist trying to understand how he cleaned so good. PS no offense. I’m just brain dead from all this studying ❤thank u Chad. Couldn’t have passed ochem without you

[@ChadsPrep]

You are very welcome - glad the channel is helpful!

[@lubdu34]

I'm most assuredly showing my ignorance here, but I don't get the whole -peak thing? I'm using AMDIS to search for a homologous series of alkenes, but my m/z plots along the bottom only start at around 50 m/z, there is no negative area on that axis?

[@learnpharmacywiththepharma7094]

As there are so many possible ways to cleave a single compound. When do we know that now to stop????

[@learnpharmacywiththepharma7094]

Hi Chad. I have a confusion which is when do we know that now we have to stop the fragmentation???

[@Frankvega96]

I got a little confused when you rearranged the 7 carbon carbocation at the end. Where did the methyl go?

[@ChadsPrep]

The methyl carbon actually got incorporated into the ring as part of a rearrangement...that is why the 6 carbon ring with a methyl became a 7 carbon ring (tropylium ion).

[@borzoo]

Thank you for great lecture 🙏

[@ChadsPrep]

You're welcome and Thank You!

[@26d8]

great explanation, so in all benzylic compounds the m/z =91 would be the base peak because the benzene ring itself is not stable In carbocation form?

[@ChadsPrep]

I don't know if you can say ALL, but possibly as the rearrangement of the benzylic cation to the tropylium is a very likely fragmentation.

[@26d8]

@@ChadsPrepGot it, appreciate your response.

[@jeromekoestel1258]

really clear, thank you

[@ChadsPrep]

You're welcome Jerome!

[@jessicasingh2925]

Hi Chad! I always watch your videos for orgo because lecture makes 0 sense most of the time haha. I was wondering in which chapter of your videos I can find videos on "Organometallic Reagents and Chemical Synthesis" (that's the name of the chapter in my textbook)? I was looking in your videos and I only found one video on organometallic stuff

[@jessicasingh2925]

just to let u know what kind of things are in this chapter: gilman and grignard reagents, suzuki reaction, organometallic stuff, cuprates, oxiranes, stuff like that. Do you have videos on these topics, if so, where can I find them?

[@ChadsPrep]

Hello Jessica! I don't have a single chapter where I cover these sorts of reactions as in your curriculum. I cover organometallics in several different videos. 12.3 Synthesis of Alcohols 19.9 Addition of Carbon Nucleophiles (to Ketones and Aldehydes) 20.4 Reaction with Organometallics (referring to Carboxylic Acids and Derivatives) 20.11 Synthesis of Carboxylic Acids (last synthesis shows Grignard addition to CO2) 21.8 The Michael Reaction (I show an example where a Gilman reagent can act as a Michael donor.) In an old set of videos with an old curriculum I had a chapter on C-C coupling reactions which covered Gilman, Heck, and Suzuki reactions. I don't have it on youtube but you can watch it here: vimeo.com/199232905 I also had videos on organometallics and synthesis with organometallics that you may find useful: Grignard Reagents (vimeo.com/162191906) Retrosynthesis with Grignard Reagents and Acetylide Ions (vimeo.com/162191907) Hope this helps and Happy Studying!

[@jessicasingh2925]

@@ChadsPrep Thank you so much Chad! Your videos are a lifesaver only person saving my orgo grades haha

[@theinvisible2395]

Take love sir

[@ChadsPrep]

Glad you liked the video.

[@gunjangunjan685]

Thanks

[@ChadsPrep]

You're welcome Gunjan!

[@MbuotidemUdo-f7i]

Thank u sir how can I have you on WhatsApp and Facebook?

[@someone8608]

Such a great explanation, just marry me by this rate