Please never stop making videos, you probably cannot fathom how much you help us with your content. These videos are THE BEST for revision of certain topics or before starting to study a new chapter, with some basic knowledge. Thank you so so so sooooooo much
Mr, in 5:14, why are the hydrogens in bridgehead not cis with succinide anhydrate??? Is not that for the endoproduct, the "out" substituent at diane will be cis to the substituent at dienophile?
Fascinating, Professor Dave. What is the ballpark energy required (i.e., change in enthalpy) to cause these electrocyclizations? They sound relatively straight-forward when you describe them, but I'm curious what kind of conditions might be necessary to cause these reactions at the commercial quantity level.
These reactions are done with photocatalysis i.e. just UV light. Fun fact: the biosynthesis of vitamin D from cholesterol in sunlight is a 6e cyclisation.
it depends, the stereochemestry changes if done with light rather than thermal conditions (high temperature), you can look up the Woodward Hoffman rules.
Awesome video Dave. I really enjoy your videos, they help me a lot on college and they are really complete. Off-topic: I wanted to ask you something. I've been having this discourse online and in my college. There are people that say science, in a way, is a social construct. My position is that it is not. What's your opinion about it? Have you made any videos on the matter?
Rodrigo, I don't know which hoax I debunked that you fell for, but take it like an adult, ok kiddo? Stop projecting your own inadequacies onto successful people. Jet, it depends on context. In a sense it is a social construct, because there are formalisms and symbology that we have developed, and everything is steeped in our own culture and what not. But also it isn't, scientific phenomena exist independently of humans and human society, waiting to be discovered. So I dunno, it's just semantics in the end.
@Rodrigo Martínez @Rodrigo Martínez What do you mean "to keep an audience"? Dave makes tutorials on UA-cam for the sake of the people who need refresh/struggle with these topics. That's the reason Dave's portfolio is so vast. No one has characterized him as a science journalist and in the sense of communication, he does that job perfectly. He does not portray his audience as uneducated, but rather those who choose to dig in their mountains of pseudoscience and flawed beliefs. I don't condone that attitude towards uninformed people honestly but that does not discredit Dave's effort. None of the videos I have watched have been flawed (scientifically). Addressing your main point, yes it is true that science has culture in different parts of the world, it is not per se, driven by cultural means as it will defy the non-dogmatic attribution of science. What is notsocial nor cultural is the sole institution of science and how it works. No Societal Norm or belief will ever synthesize the sole process of making science. Science as a whole is making models of reality that abide to certain axioms. And although I know there is an epistemic barrier to determine to up to 100% certainty but it does come as fact that science is true, everywhere. No society is necessary for science to exist.
@@ProfessorDaveExplains Yeah, i agree with you, your opinion is the one I keep to be true, but other people bring a more pragmatic approach and say its the whole institution of science that is socially constructed. But tbh you are right. It's just semantics and wordplay. Thanks for your good reply.
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Sir according to quantam mechanics,there is no existence of orbitals ,and only probability density ,then sir how can we know about the symmetry of orbitals and there overlap
If an all inclusive population could observe the Moon following the Sun on an Ecliptic Plane at the same time, could that be evidence of an entire population looking outward from the same pole, making it difficult for a spherically shaped observatory? Considering the fact that the Moon allegedly orbits the Earth “independently” from the planets and could therefore own any number of thousands of different orbital possibilities not strictly limited to the Ecliptic Plane.
You're correct to pick up the relation but it's not directly related. The prefixes cis- & trans- are Latin prefixes that mean "on this side of" and "on that side of" such as the Roman usage of cis-Alpine Gaul, (Gaul on this side of the Alps), and trans-Alpine Gaul (Gaul on the far side of the Alps). This usage of defining opposites is similar to its usage in chemistry. Ernst Buchard, a German sexologist, first used the prefixes in a 1914 book in a sex and gender context. So you're right that it is related, just not directly.
Superb lessons and explanations, but sorry, but the Intro sucks. My wife thinks i am watching sesame street. When watching a playlist that intro just makes me turn away. Hope the feedback doesn't offend you.
Please never stop making videos, you probably cannot fathom how much you help us with your content. These videos are THE BEST for revision of certain topics or before starting to study a new chapter, with some basic knowledge. Thank you so so so sooooooo much
Another Professor Dave upload, another test flawlessly passed
Thank you Dave you're doing God's work
Thank you chemistry jesus 😂🙏
This was cool Dave.
It’s very helpful for the class.
No one teaches better than the creator himself ❤️❤️❤️
Where is my playlist of logical fallacies that you promised in a video 8 months ago?
That would be really cool to see!
thank you for knowledge.
Thank you Jesus!🙌
why is everybody saying thank you jesus
@@f34rparlex92 he is truly a genius
3:55 that's really interesting 😃
Man you just keep making shit tons of these videos and they're quality as fuck
The fact his intro is funny, but through out the video he is serious
bro put a whole 🤔 in a minute 30
Thank you, really interesting video and helped me building my concept even further more as always😃
I must say, your videos are freakin' awesome
Nice explanation
Do you have a video about the Italian Philosopher Niccolo Machiavelli?
Nice video.
professor, take a look at 'wave genetics', pretty please. It'd love to have a laugh and also show it to my mom! you rock!
Mr, in 5:14, why are the hydrogens in bridgehead not cis with succinide anhydrate??? Is not that for the endoproduct, the "out" substituent at diane will be cis to the substituent at dienophile?
Fascinating, Professor Dave. What is the ballpark energy required (i.e., change in enthalpy) to cause these electrocyclizations? They sound relatively straight-forward when you describe them, but I'm curious what kind of conditions might be necessary to cause these reactions at the commercial quantity level.
These reactions are done with photocatalysis i.e. just UV light.
Fun fact: the biosynthesis of vitamin D from cholesterol in sunlight is a 6e cyclisation.
it depends, the stereochemestry changes if done with light rather than thermal conditions (high temperature), you can look up the Woodward Hoffman rules.
THANK YOUUUUUU
hi.if you can.speacking from separation of kmno4 or kmno2 from mixer reaction
Awesome video Dave. I really enjoy your videos, they help me a lot on college and they are really complete. Off-topic: I wanted to ask you something. I've been having this discourse online and in my college. There are people that say science, in a way, is a social construct. My position is that it is not. What's your opinion about it? Have you made any videos on the matter?
Rodrigo, I don't know which hoax I debunked that you fell for, but take it like an adult, ok kiddo? Stop projecting your own inadequacies onto successful people. Jet, it depends on context. In a sense it is a social construct, because there are formalisms and symbology that we have developed, and everything is steeped in our own culture and what not. But also it isn't, scientific phenomena exist independently of humans and human society, waiting to be discovered. So I dunno, it's just semantics in the end.
@Rodrigo Martínez @Rodrigo Martínez What do you mean "to keep an audience"? Dave makes tutorials on UA-cam for the sake of the people who need refresh/struggle with these topics. That's the reason Dave's portfolio is so vast. No one has characterized him as a science journalist and in the sense of communication, he does that job perfectly. He does not portray his audience as uneducated, but rather those who choose to dig in their mountains of pseudoscience and flawed beliefs. I don't condone that attitude towards uninformed people honestly but that does not discredit Dave's effort. None of the videos I have watched have been flawed (scientifically).
Addressing your main point, yes it is true that science has culture in different parts of the world, it is not per se, driven by cultural means as it will defy the non-dogmatic attribution of science. What is notsocial nor cultural is the sole institution of science and how it works. No Societal Norm or belief will ever synthesize the sole process of making science. Science as a whole is making models of reality that abide to certain axioms. And although I know there is an epistemic barrier to determine to up to 100% certainty but it does come as fact that science is true, everywhere. No society is necessary for science to exist.
@@ProfessorDaveExplains Yeah, i agree with you, your opinion is the one I keep to be true, but other people bring a more pragmatic approach and say its the whole institution of science that is socially constructed. But tbh you are right. It's just semantics and wordplay. Thanks for your good reply.
@Rodrigo Martínez what the heck??? Do you even watch his freakin awesome videos?? Stop it, you are acting really worse
Professor
Please I have a question on moment of inertia calculation. Can I SEND the question to you?
Thank you chemistry Jesus
Is this organic chemistry? I can't remember all of that. But thank you for getting me through high school
😂😂
I contracted herpes' I was told there is no Herpes cure except treatment to control it. I totally lost hope. All I could think was losing my life because it was so embarrassing to have this virus, few weeks ago I read about a possible natural cure which was guaranteed. And I ordered the treatment after some weeks I got 100% cure. Now I'm so excited to share this testimony thanks Dr okougbo Email:dr.okougboherbalhome@gmail.com.
@@willimasjohanson9926 LMFAOOO
Super!
hello professor, can you make a video about mediation fake or fiction?
Sir we have a hard time here in India due to corona crisis.. watching the video i might get distract my mind from outside horrible situation!!!
God will see you through! We are praying for India🙏
@@yourhealthmatters8676 thanks🙏
Sir according to quantam mechanics,there is no existence of orbitals ,and only probability density ,then sir how can we know about the symmetry of orbitals and there overlap
Luv that intro
NICE
Ok
Put the translation in Arabic, please, to spread the benefit
Hey guys! ⚡️We just released an interview with Professor Dave on our channel. ⚡️Check it out!! It is super interesting!
❤
What video is the thank you jesus i was hunting the meme please tell it
If an all inclusive population could observe the Moon following the Sun on an Ecliptic Plane at the same time, could that be evidence of an entire population looking outward from the same pole, making it difficult for a spherically shaped observatory?
Considering the fact that the Moon allegedly orbits the Earth “independently” from the planets and could therefore own any number of thousands of different orbital possibilities not strictly limited to the Ecliptic Plane.
0:38 in this video im still watching ua-cam.com/video/AQl8h7Aa75s/v-deo.html u fucking legend
1st comment
ترجمه
is this why people say trans gender and cis gender??? it must be right?
It is not related terminology.
You're correct to pick up the relation but it's not directly related. The prefixes cis- & trans- are Latin prefixes that mean "on this side of" and "on that side of" such as the Roman usage of cis-Alpine Gaul, (Gaul on this side of the Alps), and trans-Alpine Gaul (Gaul on the far side of the Alps). This usage of defining opposites is similar to its usage in chemistry. Ernst Buchard, a German sexologist, first used the prefixes in a 1914 book in a sex and gender context. So you're right that it is related, just not directly.
Superb lessons and explanations, but sorry, but the Intro sucks. My wife thinks i am watching sesame street. When watching a playlist that intro just makes me turn away. Hope the feedback doesn't offend you.
get over yourself please