Questions tagged [reaction-mechanism]

The detailed (and as complete as possible) description of plausible or observable pathways leading from reactants to products of a chemical process. This tag should be applied to questions about these processes. It may be applied to hypothetical and/or proposed mechanisms.

Filter by
Sorted by
Tagged with
-1
votes
0answers
18 views

Which compound mixture(s) can yield rapidly solidifying product? [closed]

I am trying to find compound mixture(s) which can rapidly solidify on mixing and can air seal a ceramic pipe opening. The mixture has to solidify rapidly and reaction takes place at (rapidly cooling)) ...
-3
votes
0answers
37 views

What happens when I mix vitamin C with Ammonium bicarbonate?

My intention is to eliminate the acid from the vitamin C, but I do not want to use sodium bicarbonate, because of the high content of sodium. I would like to use potassium bicarbonate but I am not ...
-1
votes
0answers
20 views

How to write reaction mechanism for Synthesis of 2-bromo-1,2-diphenylethanol [closed]

Could someone help me with[ how to write the reaction mechanism? How should I start?
-1
votes
0answers
11 views

Does steric hinderance matter in a SNAr reaction if both of the ortho positions are occupied by a bulky group?

Here in the fourth molecule the reaction rate should be less as its sterically hindered but the answer given is option 4. If steric hinderance does not matter then why do we have effects like SIP and ...
-1
votes
1answer
29 views

What happens if you do not allow time for an exothermic reaction to cool down?

I realise I did not give some time for the chemicals (which are releasing heat during an exothermic reaction) to cool down first and instead, I added another chemical substance to the reaction mixture ...
3
votes
0answers
26 views

Is it feasible to calculate the rate law of the oxidation of ethanol using colorimetry?

My IB Chemistry class needs to have our Internal Assessment ideas finalized by next week, and I'm torn between a few experiments. I'm considering performing an oxidation of ethanol and potentially ...
1
vote
0answers
25 views

Hydroboration, steroselectivity and anti-markovnikov product [duplicate]

My first question has to do with the fact that Hydroboration produces an anti-markovnikov product, why?. I don't see how that happens. A wikipedia artical says that B has a partial positive charge ...
-1
votes
1answer
41 views

In reaction equations, why are j and k sometimes capitalized to J and K?

From 'Leighton relationship' on Wikipedia: through the following mechanism:[2] ($J_1$) $$\ce{NO2 + h\nu (\lambda < 420 nm) → NO + O (^3P)}$$ ($k_2$) $$\ce{O (^3P) + O2 + M → O3 + M}$$ ($k_3$) $$\ce{...
3
votes
1answer
68 views

How to carry out cyclization of 1‐(2‐methylbutyl)‐2‐nitrocyclohexane?

How the cyclization can take place as there is no other functional group than $\ce{NO2}?$ One way that I can think of is photochemical bromination which occurs selectively at tertiary center which ...
-1
votes
0answers
17 views

Are there certain ratios of styrene/terephthalic acid (TPA) that favor reaction into a copolymer?

The question asks basically if I put styrene in an environment at a certain (T,P) with terephthalic acid, which reaction mechanism will dominate and at what conditions? Styrene will normally react ...
-1
votes
0answers
31 views

Does styrene react slowly or quickly with terephthalic acid (TPA) at STP?

The question asks basically if I put styrene in an environment at a certain (T,P) with terephthalic acid, which reaction mechanism will dominate and at what conditions? Styrene will normally react ...
0
votes
0answers
21 views

Show the mechanism of the Pinacol-Pinacolon Rearrangement reaction

In the reactant due to $\ce{H+}$ ion a positive charge will be created by removing water in place of the rightmost $-\ce{OH}$. But then how it will give such product. I cant see any way to make the ...
5
votes
1answer
115 views

Mechanism of ring opening of amine combined with formylation

What is the mechanism for this reaction? The tertiary amine is converted into an amide and the ring gains a double bond. I can't figure out how the C-O double bond would be formed.
1
vote
1answer
94 views

Estimating BDE Values

I'm having trouble understanding how to "estimate" the value of the BDE for the compound shown below (I believe it is a secondary benzylic C-Br value) shown below (the 58 kcal/mol). We are ...
0
votes
0answers
61 views

Draw the enantiomer products of the reaction between 1,3‐butadiene and (3Z)‐pent‐3‐en‐2‐one

From this reactants I need to draw two products with cyclohexene rings that are enantiomers to each other with chemical formula $\ce{C9H14O}.$ And also draw the reaction mechanisms. Why does it form ...
0
votes
1answer
151 views

Will a crystal of iodine lower the yield of an Grignard Reaction

I discussed the following today: If adding an iodine crystal to a Grignard to make the reaction go. will this tiny crystal force some of the metal or reagent to be used up. ergo, therefore, there is ...
-2
votes
1answer
28 views

Hindered carbon atom [closed]

In the hydration reaction that is addition of H2O , in the presence of (H.B.O/T.H.F/H2O2), where no rearrangement takes place, Why does H is placed on more hindered C atom and OH on less hindered C ...
2
votes
1answer
212 views

Mechanism of retro aldol condensation of hydroxycyclopropylketone

The reactants were treated with $\ce{NaOH} $. How the product here obtained. Can you show me the reaction mechanism for this. I found this is somewhat Retro Aldol Condensation. But how?
0
votes
0answers
30 views

Balancing reaction between lead(II) sulfide and ozone [duplicate]

I came across a question, asking to check whether the reaction is correctly balanced or not and one of the options were $$\ce{PbS + 2O3 -> PbSO4 + O2}.\tag{R1}$$ The reaction seems to be a balanced ...
1
vote
2answers
81 views

CO2 Catalytic Converter

We all know how CO2, as a greenhouse gas affects the climate and causes global warming. I was thinking of a small device, which could be attached to the exhaust pipe of an automobile. It could convert ...
0
votes
1answer
36 views

Sodium and alcohol reaction

I wonder, what happens when sodium reacts with alcohol? What is the reaction mechanism? I think that sodium is an electrophile that attacks the nucleophile oxygen atom in the -OH-group of the alcohol. ...
2
votes
0answers
42 views

Does reduction of carbonyls using borohydride ever use NaOH in the reaction?

I was reading about borohydride reductions of aldehydes and ketones in one of the Clayden textbooks, and I saw that NaOH was used in the bottom reaction for some reason: Is this really necessary? I ...
7
votes
1answer
157 views

Aspirin Hydrolysis at pH 2

Conducting an experiment, I found that very little salicylic acid was evolved performing hydrolysis at $\mathrm{pH \ 2}$ and at $\pu{45 ^\circ C}$. In fact, far more salicylic acid was evolved at $\...
3
votes
0answers
34 views

database for catalytic reaction mechanism

I am looking for a database containing detailed reaction mechanisms for (homogenous) catalytic reactions. Regular organic textbooks or papers generally draw some broad picture of how the mechanism may ...
0
votes
1answer
41 views

Relationship between molecularity and the reaction order

Should the molecularity be equal or less than the reaction order? Consider the reaction: $$\ce{H2(g) + I2(g) → 2 HI(g)}$$ If we consider the mechanism of this multi-step reaction, the molecularity is ...
7
votes
1answer
96 views

Reaction of SeCl4 with alkene and possible consecutive reaction?

There is a reaction that confused me a bit: According to my research on SeCl$_4$, it can be used as a dichlorinating agent for alkenes. However, I am totally confused about the mechanism. I've read ...
1
vote
0answers
46 views

Describe the formation of the [PbCl4]2- complex ion

The $\ce{[PbCl4]^{2-}}$ complex ion is formed when $\ce{PbCl2}$ is exposed to excess $Cl^-$ ions in solution as explained here and here through the following reversible reaction: $$\ce{PbCl2(s) + 2Cl^-...
0
votes
2answers
73 views

Why is H2O a weaker acid than acetylacetone? Shouldn't a hydrogen connected to an oxygen be more acidic than a hydrogen connected to a carbon atom? [closed]

I recently started studying chemistry after a long pause in my education so pardon me if it is a simple question. In the organic chemistry course I am taking, the professor told us that the first ...
0
votes
1answer
45 views

Hell-Volhard-Zelinski Reaction [closed]

What is the role of red phosphorus in hvz reaction? Initially I think that red phosphurus is nothing but a catalyst. But it is not a catalyst.
0
votes
0answers
39 views

Can cycloalkanes undergo electrophilic addition? If so, what is their mechanism?

Cycloalkanes have the same general formula as alkenes. Doesn't this mean that cycloalkanes can be saturated by turning into alkanes the same way alkenes use? If so, what is the reaction mechanism? In ...
0
votes
0answers
30 views

Reaction mechanism of tin(II) chloride to reduce nitrobenzene to aniline [duplicate]

Does anyone know the reaction mechanism for $\ce{SnCl2}$ to reduce nitrobenzene to aniline? I can only find $\ce{Sn/HCl}$ reaction mechanism but can't seem to find any information on $\ce{SnCl2}.$ ...
2
votes
0answers
29 views

Epoxide opening mechanism [duplicate]

Consider the following reaction: Our interest is the second step. Notice that after protonation of oxygen, the water molecule attacks in an S$_{\text{N}}2$ fashion. My question is, why does this ...
2
votes
1answer
37 views

Equilibrium with an E2 step

E2 mechanisms are known to be irreversible in general, because the forward step takes 2 species and produces three species, and a trimolecular reverse step is unlikely, purely on entropic grounds. (As ...
1
vote
1answer
35 views

Stereochemistry + isomer check

We start with compound M: [Please imagine green bonds as dotted bonds going into the plane] From compound M, we are told that the 3 membered ring is opened u using sodium azide yielding a mix of ...
3
votes
1answer
59 views

Reaction between barium peroxide and hypochlorous acid

When $\ce{BaO2}$ reacts with $\ce{HClO},$ the question tells us that that oxygen, barium chloride and one other product is formed. The equation I came up with is $$\ce{BaO2 + 2 HClO -> BaCl2 + 2 O2 ...
-5
votes
1answer
58 views

Write the detailed, stepwise mechanism of this reaction: [closed]

I couldn’t figure out how to turn the five membered ring into 6 membered ring. Pls help
2
votes
1answer
114 views

Reaction of cyclohexene oxide with LDA

The question given above appeared in the 2016 Indian National Chemistry Olympiad (INChO). What I think is that the epoxide ring is being opened by a base-catalysed mechanism ($\mathrm{S_N2}$). I ...
5
votes
0answers
72 views

Anti Markovnikov Product with Oxymercuration - Demercuration [duplicate]

Consider the Oxymercuration - Demercuration of the following compound with $\ce{Hg(OAc)2}$ followed by treatment with $\ce{NaBH4}$ in basic medium: Here, if we go according to Markovnikov addition of ...
1
vote
0answers
70 views

Does DIBAL-H reduce alcohol?

Does DIBAL-H reduce alcohol? I was reading an article by Rentsch and Kalesse [1] and I came across this reaction, but could not figure out how the final compound is formed: Reference Rentsch, A.; ...
2
votes
0answers
103 views

Stability and Rate of Formation of Carbocations

Consider the dehydration reaction of the following compounds with $\ce{H2SO4}$: (a) Tert-butyl alcohol (b) 3-Methylbut-2-en-1-ol Consider the protonation of the $\ce{OH}$ group followed by the ...
3
votes
0answers
73 views

Introducing n-propyl group to benzene using cyclopropane

I am studying Friedel–Crafts alkylation reactions and my textbook states the following proposition [1, p. 1090]: Another very good means of introducing $n$-propyl group is to use cyclopropane as the ...
1
vote
3answers
72 views

Need reactants for a rocket [closed]

I am doing a project in chemistry at the moment to build a rocket out of materials that can be easily bought and that react strongly to create thrust. I was wondering if anyone knew a good chemical ...
0
votes
1answer
41 views

When Iron reacts with any other species, how will we know that the reaction will be of Fe(II) or Fe(III) i.e. of ferrous or ferric? [closed]

Like when iron reacts with water there forms iron oxide and hydrogen but how'll we come to know which of three equation will be right equation for reaction? $$\ce{Fe + H2O → FeO + H2}$$ $$\ce{2Fe + ...
1
vote
1answer
95 views

What is the geometry of a tri-substituted methyl free radical?

My teacher explained that free radicals could have a geometry that is planar or pyramidal(tending to tetrahedral) based on whether or not it is substituted by lone-pair containing atoms. For example, $...
0
votes
0answers
25 views

Mechanism for Lucas Test [duplicate]

In the mechanism for Lucas' Test for Alcohols, I am reading two different types. One says the first step is the abstraction of a proton from HCl, but on other references, I also see that the first ...
7
votes
1answer
155 views

Retro Diels–Alder reaction in synthesis of corallopyronin A

I was looking at the synthesis of corallopyronin A in the following paper by Rentsch and Kalesse: Angew. Chem. Int. Ed. 2012, 51 (45), 11381–11384. There is one reaction which is described as ...
3
votes
0answers
18 views

Aluminum Battery with PAC setup : Rapid voltage drop problem after a charge

I am a retired man and seek for activity. I dont have background in chemistry but I want to learn an aluminum battery..the known problem is my aluminum metal get eaten and also corrosion even if using ...
0
votes
1answer
87 views

SN2 reaction with alkyl bromide and pentanenitrile? [closed]

Is it possible to do a Friedel-Crafts alkylation on a plain alkane such as the one I've attached below, or is it only reserved for EArS mechanisms? Also, I was wondering what would happen if I tried ...
0
votes
0answers
33 views

Why use Stork enamine alkylation?

I recently learned about the Stork enamine alkylation method of adding electrophiles to the beta carboxyl position on a molecule. But I can't seem to find out why a direct synthesis is not possible (...

1
2 3 4 5
48