 Okay, next reaction write it down We are using CS3 OH in this reaction See this one We are using here CS3 OH So it's only CS3 OH like any other no no CS3 OH any new to find you can take But if I so I can take C2 H5 OH and all of that Now the product is what if I write on the product in one single step what we have to do This OCS3 will come over here Which is This comes over here and edge comes over here under this This is the product of this reaction I'll get L-coxia mercuration demarcation. Mechanism you see in the first step what happens Hg Coac This pi electron will attack on to this and we'll get a Cyclic Mercurinium and In the next step we have alcohol not water So this lone pair with this lone pair alcohol behaves as a nucleophile and this will attack on to the more substitute carbon atom Which is this right and this bond pair on to this Mercury so the product is CS3 CH OCS3 CH2 Hg OAC Always it is opposite side attack. Okay opposite of this ring. You will minimize the repulsion steric repulsion Now in the next step we have NABH4 with OH- This replace this group and it forms CS3 CH OCS3 CH2 See overall what happens addition of OCS3 and H plus from where this H plus is coming or hydride I not It is coming from NABH4 Right NABH4. So if you write here NABD4 Right NABD4, then here we'll have D not hydrogen Okay, NABD4 So keep this mind Basic medium reaction. It's not taking part in the reactions So it always just takes the action and puts it on that one. Yes So basically you have to Take care of what do you have here? What is the solvent? There is alcohol water and here we have H or D or H So what if you put like CH3CO Over there I take CH3CO You'll get then CS3CO If you have CS3CO H here, any compound which has active hydrogen So this this load pair is dealing as a nucleophile lentine So this will attack first and then H plus goes on Okay In the next step this will write what minus H plus this H plus goes out and we'll get So if you have this then it is O C double-pond of CS3 Any other nucleophile any nucleophile it is there It is possible even if you write down ammonia NH3 but that also it's same You'll get NH Okay, so this they'll change this only in doubt Okay, next you write down Hydroboration Oxidation reaction. Yeah, so what happens to HGOAC? After this what happens after this the mechanism is quite complex. Okay in the books also it is not given Okay, what they have written you'll get some complex of mercury some book They have done simply HG and AC O H acetic acid And some book they have even write we'll get some complex of mercury Complex compound means mercury with some, you know Complex will also define in terms of whether it can lose its property in the solution Cyclohexy is The most stable because it's not clean but then according to our assignment Is more stable than Is more stable than cyclopentane and because of less angle is yes, sir because because it's not Because of less angle is Exist in chair form Overall it's energy is less in this form Exist in chair form like this But it's stable because of less angle is all These are conform much like different conformations of cyclone Board So but don't those two carbons still have Only all are sp3 See All carbon atoms are sp3 hybridized According to the geometry Overall the energy of this is least among the different conformers conformations of cyclone That's why this is the most stable Those two vertices also have Yes Okay next right our hydroperation oxidation reaction So organic chemistry Still ketones that's why it's very important organic chemistry once you finish you have to do it again There are some reactions which we are studying here But detail mechanism everything you will understand in the other chapters like i'll be Carbine there are many reactions which forms carbine as an intermediate Like aromatic chemistry Now I will do organic only like after this we'll do some Reaction mechanism That chapter we'll do almost 80 percent or 70 percent of chemical reactions First time reaction mechanism at least we should do after nomenclature But here the problem is we have to follow the school the pattern also Otherwise some of you will say sir Coaching industry where they teach first And then they'll go to the reaction mechanism goc Isomism you remember totemism the concept So you have to understand resonance So goc reaction mechanism then Take it but we'll do we have time Next right our hydroperation oxidation reaction Right on this reaction involves right okay this reaction involves addition of Borein to an alkene what is the formula of bore? Ph3 diborel is b2l6 the dimer of borel right So which reaction was hydroboration oxidation reaction? This reaction involves addition of borel to an alkene Which forms which forms organoborane intermediate Organoborane intermediates are this so generally term rbh2 don't write this Rbh2 r2bh and then r3bh so eventually you get Trialkyl borane in this reaction first in the first system okay next line next write down R3b Next let's write down in the next step In the next step trialkyl borane Is allowed to react with H2O2 hydrogen peroxide in basic medium OH- H2O2 OH- Trialkyl borane is allowed to react with hydrogen peroxide H2O2 in basic medium and forms alkohol This reaction follows anti-marconic of addition Anti-marconic of addition See in the first one also we get alcohol here also we are getting alcohol But the first one is what marconic of this one is anti-marconic of okay You see alkene is supposed CH2 double bond CH2 This is alkene and what are the reactants for this reagent for this the first one is We use bx3 In ether basically solvent we use and we can also have thf tri tetrahydrofuran which is a cyclic ether What is the structure of thf? thf plus structure here tetrahydrofuran okay First is this and in the second step it is allowed to react with H2O2 with OH- H2O2 with OH- So the product in this reaction is CH3 CH2OH Plus VoH whole price Okay, this is the product how do we write down the product anti-marconic of addition of H plus and OH- Now how the reaction proceeds See bx3 all three boron hydrogen bonds Are reactive Right all three boron hydrogen bond. So what happens here? This converts into CH3 CH2 BH2 in the first step H- This comes over here take this H- and then this boron attached with this carbon atom Okay, okay over this comes over here It takes this H- and then this boron carbon attached So basically CS3 CH2 CS3 CH2 BH2 You see this is this one R BH2 where R is this group Okay, if we allow this to react with CH2 double bond CH2 again, what is the next one we'll get actually in this reaction We are taking three moles of this alkane Overall you have to Yes three moles of this and we'll get three moles of alcohol I forgot to write this but this is a reaction three moles of this and this so again If you have this alkene one more we have used here another mole is this so this again replace the hydrogen, right? So we'll get what CS3 CH2 All twice BH and then one more step CS2 double bond CS2 gives you CS3 CS2 Whole price b that is R3B right try alkyl boron write down the name R3B Try alkyl boron Wait, so so the So the electrons if they shift from the double bond to carbon and then from carbon to hydrogen. Yes How how does that happen? So like the hydrogen will have to come pick it up So See one possibility is this another way also you can understand that this boron is electron deficient. Okay, no It'll electron clear except that it has one vacant pure So another way also this is also one type of mechanism. They have given in Another way also what they define that this comes over here under this carbon atom And this electron is taken up by this boron And one h plus comes out which attached with this carbon That way also you can understand electron pair Except bx as a louis acid then this h is attached with this carbon atom Okay, this is try alkyl boron now this try alkyl boron on reaction with H2O2 OH- we do not have mechanism here H2O2 OH- it gives CH3 CH2 OH Three molecules of this if you plus b OH CH2 double bond And we have This comes over here and this attraction to this positive charge Now one of the hydrogen takes this bond pair comes out with H- and this attraction So so hydrogen is also in that they also take the electrons No, it takes this H plus this takes this H plus from this molecule This goes over here Okay, and then make this for a negative charge So does H2O2 dissociate to become OH or H? H2O2 is an acid peroxy acid it's a structure of open book structure So usually this also But it is an acid right so it this H plus is taken up by this OH minus And then H2O and then H2O So OH radical is made for this homolysis is possible Radical may fall because peroxy acids are generally very Being of peroxy bond because of the presence of lone pair That's why the bond is very Okay, so here it is anti-marconic of addition first to what it was marconic of addition In this one it does not make any sense, but if you have unsymmetrical