Maybe regiospecificity for the a potential halohydrin product should have been mentioned for the third reaction. For anyone who may be watching the video and wondering, it follows a Markovnikov situation where the OH group will attach to the more substituted Carbon.
1 I personally think it would be better Professor Dave places more elucidation on the "halonium ions": how they take out a lone pair to form those C-X sigma bonds and then to form the three-membered ring. 2 I learnt that there is nonetheless regiochemistry involved, not because of the outcome of a dihalide. There is regiospecificity when the leftover bromide anion decides which "partial carbocation" in the ring to attack. The more substituted partial carbocation factually gonna get the bromine first. 3 I think it would be better if you display the anti relation of the bromines on a planar structure--with a cyclohexene--for visualization purposes. This way people better understand the stereochemistry. Last but not least, I have one question, why the bromines are in anti relation, why the other bromide(halide)has to break the ring from the opposite side of the bromonium(halonium) so it resembles Sn2, is it because only in this way can we have a anti relation of the bromines that offers the molecule least steric hindrance?
the double bond gave one electron to the hydrogen proton to neutralize the H+ to H, and forming a bond with the carbon on the right carbon. During this step, the double bond was simultaneously broken and formed that bond with the carbon on the right. Basically, the two electrons on the secondary carbon broke off, connecting to the H+ atom while the primary carbon on the right side pivots without breaking, being part of the new carbon-hydrogen bond.
so i cover halogenation in an earlier clip! though i don't do it in aqueous solution, if it's aqueous, the bromonium ion intermediate forms and then water pops open the ring rather than a bromide, so you get the halogen and hydroxyl on adjacent carbons, which is called a halohydrin.
u can rotate one chiral centrum, then u ll get a meso configuration. with any trans alkene with symmetry substitutes u can ve a meso configuration, right?
kessaria92 a molecule is either meso or not, rotating any bond will not change its status. as for alkenes, cis or trans won't tell you if it's meso without more detail, you have to find a plane of symmetry, which could either be the plane of the double bond or perpendicular to the bond.
+Professor Dave Explains At 8:32 the last compound is labeled R and S however the Meso product is drawn therefore there is no chirality and R and S should not be labeled. On another note, Professor Dave, your videos are awesome.
incorrect! meso compounds are achiral despite having chiral centers. the chiral centers can and ought to be labeled even though the molecule is achiral overall. but thanks for the kind words!
Teacher please help me: when you have ethene and chlorine reacting occours and electrophilic addition. Why? Is there any video explanning this kind of reaction? I thought that would happen a homolytic addition, but no. Im from Brazil and in RUclips I didnt find any video explanning this in my language so im trying to search in other languages. Could you help me please?
I know it's been half a decade, but I just came across your comment and thought about answering it. I think the process of halogenation is referred to as "electrophilic" because, in the first step, one of the halogen atoms will act as an electrophile and be attracted to the electrons in the pi bond. Did that answer your original question? Also, how have your studies been going over the years?
@@PunmasterSTP I didn't even remember I commented here lol it's been many years indeed and I no longer need to know that. I'm almost graduating in med school, so fortunately I got to get into the university I wanted without fully understanding this topic. Thank you though. I really appreciate your answer even though I have no idea what you're talking about these days lol
that's when i had this bizarre case of alopecia, it's an autoimmune disease. it was very distressing! but the doctor took care of it and the hair grew back there so i'm fine now. i'm actually surprised that in almost four years you're the first person to ever notice/mention that, to me it looks so awful!
@@ProfessorDaveExplains I am glad you r okay now! It's in my Gene bro I AM A MEDICO ! I SAW MANY OF YOUR VIDEOS DURING PREP TIME !! SO whenever I felt alone or sad I come to RUclips and see all the faces that I had seen during my prep days 😫 it makes me so satisfied ❤❤
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Need OChem help? Find me and all the resources you need on Chemmunity: chemmunity.info/dave
The longer I get into my all-nighter, the more Professor Dave could like... get it.
InstaBlaster
down bad cataclysmically lmao
Down chemically
Zaddy organic Dave 😜
you just made my all-nighter
thank you so so much prof , you simplified organic chemistry for me
i love you professor dave
and i love you, friend.
Friendzoned. FeelsBadMan
@@glokta1 hahahaha 😂
Maybe regiospecificity for the a potential halohydrin product should have been mentioned for the third reaction. For anyone who may be watching the video and wondering, it follows a Markovnikov situation where the OH group will attach to the more substituted Carbon.
Prof, before I turned to RUclips channel learning organic chemistry chem was a hard nut to crack,but now, it's ' a walk in the pack' thanks😊
A walk in the park*
As easy/pleasant as walking in the park.
professor dave you the GOAT! Greatest of all time!
you're saving my life in OChem rn youre the best
I know it's been five years, but how'd the rest of ochem go?
@@PunmasterSTP it went great! I graduate with my major in Chem and concluded Ochem has been on of my favorite chem series in college!
@@TonyLovesLights I’m glad to hear that! By any chance are you still in academia, or did you go into industry or do something else?
@@PunmasterSTP I’m currently in grad school studying to become a teacher in Chemistry and General sciences! Once a nerd always a nerd haha
@@TonyLovesLights Sounds great and I feel ya.
These videos are so helpful! Thank you Dave you rock
Hydrohalogenation? More like "Hey, these are great videos; go watch them!" Thanks again so much for making all of them.
Thank you!! I actually know what's going on now.
Thank you so much! your videos are greatly appreciated!
Wooow,, it's organic chemistry made simple, Am in light now no more darkness in organic chemistry
6:06 Chapter on DIHALOGENATION ;)
1 I personally think it would be better Professor Dave places more elucidation on the "halonium ions": how they take out a lone pair to form those C-X sigma bonds and then to form the three-membered ring. 2 I learnt that there is nonetheless regiochemistry involved, not because of the outcome of a dihalide. There is regiospecificity when the leftover bromide anion decides which "partial carbocation" in the ring to attack. The more substituted partial carbocation factually gonna get the bromine first. 3 I think it would be better if you display the anti relation of the bromines on a planar structure--with a cyclohexene--for visualization purposes. This way people better understand the stereochemistry. Last but not least, I have one question, why the bromines are in anti relation, why the other bromide(halide)has to break the ring from the opposite side of the bromonium(halonium) so it resembles Sn2, is it because only in this way can we have a anti relation of the bromines that offers the molecule least steric hindrance?
u r superb!!!!thanks for the explanation sir ....
you are a star!
There was no intro?! Y?
sir can u make video on nucleophilic addition and substitution
i've got tons of that! look through my organic chemistry playlist.
4:35 where did the H+ go after he took the electrons?
the double bond gave one electron to the hydrogen proton to neutralize the H+ to H, and forming a bond with the carbon on the right carbon. During this step, the double bond was simultaneously broken and formed that bond with the carbon on the right. Basically, the two electrons on the secondary carbon broke off, connecting to the H+ atom while the primary carbon on the right side pivots without breaking, being part of the new carbon-hydrogen bond.
Good
I cannot thank you enough
What about Br2(aq)?? Where does the OH and Br go to?
so i cover halogenation in an earlier clip! though i don't do it in aqueous solution, if it's aqueous, the bromonium ion intermediate forms and then water pops open the ring rather than a bromide, so you get the halogen and hydroxyl on adjacent carbons, which is called a halohydrin.
Bro honestly you look like Jesus.... Come save me
thank u so much!!!
u can rotate one chiral centrum, then u ll get a meso configuration. with any trans alkene with symmetry substitutes u can ve a meso configuration, right?
kessaria92 a molecule is either meso or not, rotating any bond will not change its status. as for alkenes, cis or trans won't tell you if it's meso without more detail, you have to find a plane of symmetry, which could either be the plane of the double bond or perpendicular to the bond.
+Professor Dave Explains At 8:32 the last compound is labeled R and S however the Meso product is drawn therefore there is no chirality and R and S should not be labeled. On another note, Professor Dave, your videos are awesome.
incorrect! meso compounds are achiral despite having chiral centers. the chiral centers can and ought to be labeled even though the molecule is achiral overall. but thanks for the kind words!
he is the second coming
Teacher please help me: when you have ethene and chlorine reacting occours and electrophilic addition. Why? Is there any video explanning this kind of reaction? I thought that would happen a homolytic addition, but no. Im from Brazil and in RUclips I didnt find any video explanning this in my language so im trying to search in other languages. Could you help me please?
I know it's been half a decade, but I just came across your comment and thought about answering it. I think the process of halogenation is referred to as "electrophilic" because, in the first step, one of the halogen atoms will act as an electrophile and be attracted to the electrons in the pi bond. Did that answer your original question? Also, how have your studies been going over the years?
@@PunmasterSTP I didn't even remember I commented here lol it's been many years indeed and I no longer need to know that. I'm almost graduating in med school, so fortunately I got to get into the university I wanted without fully understanding this topic. Thank you though. I really appreciate your answer even though I have no idea what you're talking about these days lol
@@isadoracoms Haha, it’s great to hear from you, and I’m really glad to hear that you’re almost done with med school!
thank you Jesus
plz show the carbon don't draw only bond
you gotta get used to line notation! that's how chemists draw molecules.
You're awesome
you are!
Do you teach outside the videos? where are you from? Lets toke one and talk chemistry man.
no teaching these days! just the channel.
Thank You Jesus
I'm more interested on what your forearm tattoo means....
the diagram of a parsec! i'll cover it in astronomy soon.
G-d bless you Professor Dave!!
gid?
You Mr. , look like a hefty Joe Allen , although you are American .
Anyways good videos , and nice explanation . Keep up the work 👌
Jaikrishnan Menon or a more taller grenaro gattuso
uhh..whuh..uhh
OMG you r becoming bald😭😭😭😭!!r u losing hair sir😰😭😭😭😭😭😭😭😭
that's when i had this bizarre case of alopecia, it's an autoimmune disease. it was very distressing! but the doctor took care of it and the hair grew back there so i'm fine now. i'm actually surprised that in almost four years you're the first person to ever notice/mention that, to me it looks so awful!
@@ProfessorDaveExplains I am glad you r okay now! It's in my Gene bro I AM A MEDICO ! I SAW MANY OF YOUR VIDEOS DURING PREP TIME !! SO whenever I felt alone or sad I come to RUclips and see all the faces that I had seen during my prep days 😫 it makes me so satisfied ❤❤