The only thing confusing me is in the last problem, how did you determine the two methyl groups on the final product were facing down. Is it related to the rule that everything to the left goes down?
Look at the carbons that the methyl groups are attached to in the beginning. When the new bonds are formed between those carbons and the carbons in the dienophile the hydrogen is kind of "pushed up." In the final product, the methyl groups are attached to an sp3 carbon now, so since the hydrogen is pointing up all the other groups will point down.
oh no, i need to recrystalize my maleinsäureanhydrid out of tbme first. Id much rather watch bobo Siebenschläfer on Netflix. but your video keeps me up in these hard times. greetings from Germany
@@na-chan163 draw out both compounds and then designate (for each compound) the chiral centers as R or S. You will see that for whatever answer you reach for one compound the opposite answer will be reached for the other. Hence making them enantiomers.
Can you please tell me why my teacher drew the CHO facing down instead of up? She call it the endo rule (even though the CHO facing toward the outside). But here in your example you have the CHO facing away as well (toward the outside and you have it facing up, which make more sense to me). But is it me or something is wrong here? I have a test in two days..
I'm sure you get it a lot - but you have to know how helpful these videos are. Thanks so much.
The only thing confusing me is in the last problem, how did you determine the two methyl groups on the final product were facing down. Is it related to the rule that everything to the left goes down?
Look at the carbons that the methyl groups are attached to in the beginning. When the new bonds are formed between those carbons and the carbons in the dienophile the hydrogen is kind of "pushed up." In the final product, the methyl groups are attached to an sp3 carbon now, so since the hydrogen is pointing up all the other groups will point down.
Sir, I am Uma from India working as a lecture, your presentation was really excellent.
So underrated
plz tell me which software u use for all this demontrations
oh no, i need to recrystalize my maleinsäureanhydrid out of tbme first. Id much rather watch bobo Siebenschläfer on Netflix. but your video keeps me up in these hard times. greetings from Germany
Excellent explanation....
How are the two last products enatiomers?
same question here.. I think they're identical.
@@na-chan163 draw out both compounds and then designate (for each compound) the chiral centers as R or S. You will see that for whatever answer you reach for one compound the opposite answer will be reached for the other. Hence making them enantiomers.
I'm confused. I thought atoms point out of the ring were always down, and atoms pointing into the ring were always up?
+Green Marble That only applies to dienes. Hope this helps. Organic exam this Friday yay
Can you please tell me why my teacher drew the CHO facing down instead of up? She call it the endo rule (even though the CHO facing toward the outside). But here in your example you have the CHO facing away as well (toward the outside and you have it facing up, which make more sense to me). But is it me or something is wrong here? I have a test in two days..