Constitutional Isomers of Alkanes
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- Опубликовано: 9 июл 2024
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leah4sci.com/organicchemistry/ presents: How to find constitutional isomers for alkanes or hydrocarbons with a hydrogen deficiency of zero.
Alkane Constitutional Isomers Quiz - COMING SOON!!
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from today on,you are officially my organic lecturer away from campus...
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Thanks so much for that. I needed some questions answered and you answered them. I understand this topic now
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Thank you so much! I have watched all the 14 videos, and I have learnt a lot.I love the way you explain.
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Thank you so much. You've really helped me out. So clear and thorough!
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Same here. Thanks for the help Leah!!! :)
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Awesome video! I feel a lot more confident about this now. And I know how to avoid pitfalls. Thanks!
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Wow...now I really get this! Thanx!
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Nowadays text books have questions like how many constitutional isomers are possible for compounds having a molecular formula CnH2nO, how to answer that? Draw out all of them?
In this video, I only focus on constitutional isomers of alkanes. So to answer your question, you would first need to determine whether you had any degrees of unsaturation using the index of hydrogen deficiency, which I teach in this video: leah4sci.com/degree-of-unsaturation. The IHD will tell you if there are any pi bonds or ring structures in your compound. After that, then yes. You would need to draw out every possible structure. It’s easiest to start with those that are linear and then move on to branched structures.
This video has been a life saver - thank you!
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Thank you so much! This was so helpful!!!
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at 3.56 you did my next video, but i couldn't find that video anywhere.. do you mean your degree of unsaturation , hydrogen deficiency video?
Yes, that’s the video I was referring to. You can find it on my site at leah4sci.com/degree-of-unsaturation
thanks a million, please make more videos on naming other than alkanes and more on electron pushing and diagrams. I recommend your channel to all my classmates because THE BEST organic chem tutor on youtube
Oh wow thanks so much for the recommendations, that's the highest compliment I can get!
Very good explanation! Thanks!
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thanks leah you're a great help to me surviving my chemistry courses
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Great expectation Ma'am
Thanks a lot
its really help me to understand
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Hi Leah, thank you so much for your videos! They're very helpful. One question though where you are talking about CH3CH2CH2-CH3(coming off the third carbon) being a butane, why wouldn't this be a methylpropyl? Why isn't CH3 considered a branch of a methyl group coming off the third carbon from the parent chain? Thanks for your help!
Rachel Cutting since all the carbons are still in a continuous chain, it isn't considered a methyl group.
Remember before you name them you want to find your parent chain the longest continuous chain of carbons. Since it is apart of the parent chain it is not considered to be a side chain.
Use the highlighter trick for this. If you can trace your highlighter from the first to last carbon, regardless of how many turns on the molecule, it's considered a continuous chain rather than a branch. If you have to lift your highlighter to catch a branched atom, that's a brach
Is there a direct method to know how many isomers for a specific organic compound we have ?
There is a formula for finding the number of stereoisomers, but it’s not that easy or straightforward when it comes to constitutional isomers. What’s easiest is to draw out all of the possibilities, starting with the linear structures and then moving on to branched ones. You also might want to learn how to identify any degrees of unsaturation by watching my video at leah4sci.com/degree-of-unsaturation
Goodness! took me 12 minutes to learn what i've been try to learn for 2 weeks ,,.My teacher really confuse me in something so simple.
regina stew same here
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You are an angel from heaven. I did not understand till now. And I have a test in 7 days.
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i have a test tomorrow didn't knew that till now ... THAAANK YOU !!!!
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I got an A in High School... Kept learning from you all throughout university and now doing very well in life. I sincerely appreciate what you're doing! @@Leah4sci
thank a lot , it really help me !
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Superb lecture...
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Helped a lot! Now I actually know a method to make the isomers! Before, I was just trying to think of them randomly, and it was a mess!
So happy I was able to connect the dots!
perfectly understood.thanks
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Fan of your teaching
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super helpful!
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