Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [reactivity]

Applied to a chemical species, the term expresses a kinetic property in reference to another species. The tag should be applied to questions seeking answers with respect to the reactivity (or unreactivity) of a certain chemical compound, species, molecular entity and/or functional groups. It must not be applied to questions about the stability of certain chemical species.

0
votes
1answer
22 views

What is the reason for more stable keto form to tautomerise to a less stable enol form?

In the mechanism of SeO2 I have seen that a more stable keto form first converts to a less stable enol form and then yields a diketone. I have seen many other reaction where the reactant converts to ...
0
votes
0answers
24 views

Is the water absorbed by sodium polyacrylate available to react?

I'm curious whether the water absorbed by sodium polyacrylate would react with alkali metals, or be trapped by the sodium polyacrylate.
1
vote
1answer
46 views

Order of reactivity of hydrogen halides

Solomon and Fryhle $11^{th}$ edition says : Order of reactivity of HX in the acid catalyzed conversion of alcohols to alkyl halides follows the order : HI>HBr>HCl We can account for this by saying ...
0
votes
1answer
36 views

In a galvanic cell why does using a more reactive metal increase the voltage?

As the title says, why does using magnesium produce a higher voltage compared to using zinc when reacting with iron? Im having trouble figuring out why the voltage changes. magnesium+copper > zinc+...
4
votes
1answer
48 views

Does aluminum oxide react with rubidium?

I have rubidium vapor inside of the vacuum chamber. Inside the vacuum chamber, there are two flat stainless steel coated with aluminum oxide at temperature ~100 °C. Since rubidium is active, I am ...
2
votes
1answer
32 views

Rationalising the reactivity of phosphoryl chloride

$\ce {POCl3}$ is a reagent well-known for enacting various functions in organic synthesis. For example, together with pyridine, it is able to dehydrate alcohols to give alkenes. Also, reacting it with ...
1
vote
1answer
41 views

Reaction between NaOH and Carbonic acid

I was presented with the following reaction when we were just learning about acids and bases: $$\ce{2NaOH + H2CO3 -> H2O + Na2CO3}$$ however I had thought it might've been something like $$\ce{...
0
votes
0answers
25 views

Why does Magnesium burn hotter than other Group II metals?

It seems apparent, when one performs the standard "flame tests" in a lab, for the Group II elements that Magnesium burns by far the hottest and brightest. Why is this true? I wouldn't expect this at ...
2
votes
2answers
74 views

Reactivity of primary and tertiary alkyl halides

From USNCO 2004, Q58: The reaction between which pair of reactants occurs the fastest for $[\ce{OH-}] = \pu{0.010 M}$? (A) $\ce{CH3CH2CH2CH2Cl + OH-}$ (B) $\ce{(CH3)3CCl + OH-}$ (C) $...
2
votes
0answers
59 views

Where will a H+ attack on 6-hydroxyhexan-2-one? [closed]

Where will a H+ attack on 6-hydroxyhexan-2-one? Protonation can take place either on the ketone or the alcohol. So where will it attack? In short, on which of the two oxygen atoms is electron density ...
4
votes
4answers
154 views

Which is more reactive, chlorine radical or chloride ion?

Ions are very reactive for obvious reasons (i.e. Coulomb force); $\ce{Cl-}$ ions will be very quick to form an ionic bond with positive ions (unless inhibited, e.g. through being in a solution; let's ...
0
votes
1answer
20 views

Would atomic oxygen and atomic hydrogen result in O2 and H2 only, or some H2O too? [closed]

Let's assume we have atomic oxygen and atomic hydrogen in a closed chamber, the temperature and pressure of which we're able to monitor (and control). Number of hydrogen atoms are twice that of oxygen....
3
votes
1answer
426 views

How is fluorine gas contained and transported, why aren't the metal cylinder and tube in this video attacked?

I included the GIF below as part of an answer to Can paper burn without oxygen or air?. It was made from the video Fluorine - Periodic Table of Videos. I noticed that the cylinder containing the ...
9
votes
3answers
468 views

How does ring size affect SN2 reactions?

Suppose we have to compare the $\mathrm{S_N2}$ reactivity order for cyclopropyl and cyclopentyl chloride. How can we do that? I think that cyclopentyl should be more reactive towards $\mathrm{S_N2}$ ...
-3
votes
1answer
75 views

why fluorine and oxygen have different behaviour towards electron gain enthalapy and electronegativity? [closed]

I have seen following definitions in my textbook: Electron gain enthalapy may be defined as enthalpy change taking place when an isolated gaseous atom of the element accepts an electron to form a ...
5
votes
0answers
66 views

Reactivity of carbon-centered radical

I've read this site for a long time but I had never asked a question, so this is my first time :). So, i'm currently working on a computational chemistry project on radical cyclization reactions and ...
1
vote
2answers
59 views

Reactivity of fluorine compound

I have tried to make sense of the article on fluorine on Wikipedia but I am still very perplexed. I would like to know generally how reactive the fluorine compound β-(4-Fluorophenyl)-γ-aminobutyric ...
1
vote
0answers
29 views

How to predict and measure excess values of reactivity ratios for copolymerization with three monomers?

I ask this question because I haven't found interesting literature on the subject and I would like to know if my way to think is good or pure bullshit. Also the question is quite long because I have ...
8
votes
1answer
133 views

Does chlorine trifluoride react with candlewax?

I've run across references to chlorine trifluoride quite a lot. It pops up fairly regularly on the Worldbuilding SE, and whatever idea people have with it is usually shot down very quickly - For ...
0
votes
1answer
98 views

Metal reactivity with hot water VS HCL

Does being able to react with hot water take more metal reactivity than being able to react with HCl? To me, it seems like a metal would need to be more reactive to be able to react with hot water ...
1
vote
1answer
53 views

Can nitrogen dioxide react with plastics of any kind? [closed]

I have searched a lot on the internet but couldn't find any helpful thing. My question is that can nitrogen dioxide react with plastics of any kind?
6
votes
0answers
420 views

SN1 reactivity order for chloromethyl methyl ether and trityl chloride

Compare the reactivity order towards SN1 reaction for: (2-chloropropan-2-yl)cyclopropane $\ce{CH3OCH2Cl}$ $\ce{Ph3CCl}$ Owing to the exceptional stability of cyclopropyl ethyl ...
4
votes
1answer
239 views

Why are fluoride ions (and ions in general) reactive?

Please bear with me—-I have a pretty meager background in chemistry but am trying to learn some! My question is about ion reactivity—-specifically of the reactivity of $\ce{F-}$. I often hear that ...
9
votes
1answer
321 views

Reactivity of different isomers of N2F2

$\ce{ N2F2}$ exists in two forms cis and trans. Today my chemistry teacher tells me that among the two only cis form takes part in reactions and that it is more reactive. But I have read elsewhere ...
33
votes
5answers
6k views

Why does potassium react more violently with water than lithium?

Recently, I was telling my friends about the violent reaction that takes place when you throw potassium into water. Soon after, a friend of mine claimed that lithium would react more violently than ...
2
votes
1answer
496 views

What noble metal is most oxidation resistant? [closed]

To clarify,by noble metals in this case I mean all platinum metals + gold,no copper,silver or rhenium.These noble metals are described as having low reactivity,but which one is least reactive or most "...
5
votes
5answers
239 views

Can halogens exist in their elemental state in nature?

Question 7 from the 2015 Australian Chemistry Olympiad was: Which list below gives non-metals that can be found in their elemental form in nature? (a) neon, phosphorus, fluorine (b) helium, ...
1
vote
0answers
85 views

Requirement of different reagents for bromination of different substituted benzene rings

Consider the bromination reactions of phenol and anisole. We know that the former can be brominated by aqueous bromine, while the latter requires the catalyst $\ce{FeBr3}$ instead. Our teacher said ...
6
votes
0answers
82 views

Compare rate of hydrohalogenation between 1,2-diphenylethene and 1-phenylpropene

Consider the compounds, (I) - 1,2-diphenylethene and (II) - 1-phenylpropene. Compare their rate of hydrohalogenation (HX addition) I feel that the answer should be (II) > (I), but to my surprise it's ...
9
votes
1answer
529 views

How does conjugation affect reactivity?

From this topic on MOs of butadiene vs ethene, it is clear that when two ethene molecules are combined to extend the conjugate chain, the HOMO is raised in energy and the LUMO is lowered in energy. ...
-1
votes
1answer
80 views

Does attachment of phenyl to an alkene increases its reactivity towards electrophilic addition reaction?

According to me phenyl should decrease the reactivity as its electron withdrawing nature destabilises the carbocation.
0
votes
1answer
501 views

Reactivity of Benzaldehyde between aldehydes [closed]

Are Benzaldehydes less reactive than aldehydes due to the -R Effect of the -CHO group present on the benzene ring?
1
vote
0answers
47 views

Do amides oxidize to double-bonds?

Do amides from primary or secondary amines ever oxidize to a double-bond on the nitrogen? For example, like from an $\mathrm{R \bbox[yellow]{\color{red}{-}}(NH)-(C=O)-R'}$ to an $\mathrm{ R \bbox[...
2
votes
3answers
3k views

Reactivity order of electrophilic addition

Find the order of the ease of electrophilic addition of the following: $\ce{H3C-O-CH=CH2}$ $\ce{ F-CH=CH2}$ $\ce{Cl-CH=CH2}$ $\ce{NO2-CH=CH2}$ According to me, it should be 1 > 4 > ...
4
votes
1answer
268 views

What drives a molecule/atom towards stability? [duplicate]

I'm very familiar with the concept that chemical reactions occur because the reactants a state of stability via the reaction. It's a very satisfying and fulfilling statement. But my question has ...
3
votes
3answers
2k views

Why is oxygen an oxidizing agent?

Why are diatomic oxygen molecules STILL reactive especially with metallic elements like sodium and copper even at room temperature? You would think that since the two oxygen atoms already have the ...
3
votes
1answer
214 views

What changes does zinc chloride undergo when ‘fusing’ on an atomic level? How does this influence reactivity?

I have been using a reaction with an organozincate starting material. This zincate is freshly prepared from zinc chloride and a Grignard reagent. The experimental procedure ‘handed down’ from more ...
0
votes
0answers
54 views

What's the chemical reaction involved when adding Caesium to water?

According to the Notting Hill and Ealing High School, the reaction of caesium $\ce{Cs}$ with water $\ce{H2O}$ gives the following equation, $$\ce{2Cs (s) + 2H2O (l) → 2CsOH (aq) + H2 (g)},$$ producing ...
1
vote
0answers
112 views

Why is cyclopropylmethyl radical opening so fast?

Ring opening of the cyclopropylmethyl radical is reliable and fast, and so has been used as a radical trap and a radical clock. Could someone please explain what exactly makes this reaction so fast, ...
2
votes
2answers
642 views

Stability of carbanion

I am confused about how one can determine the stability of carbanions using pKa-values. I know that the stability of carbanions can be determined by the inductive effect, hybridization of the charged-...
0
votes
1answer
788 views

Order of Reactivity of Halogens in Electrophilic Addition

Hello there. Here's a problem that appeared on one of my tests. What is the order of reactivity of halogens in electrophilic addition reaction via formation of cyclohalonium intermediate? I tried ...
1
vote
1answer
1k views

Why are not all metals included in the reactivity series

Why aren't all metals included in the activity series ? For example why isn't molybdenum included ? Now we know that hydrogen displaces those metals from their oxides that are less reactive than iron. ...
1
vote
1answer
179 views

Can hydrobromic acid perform substitution with propane?

I am a student in the 11th grade, we recently had a chemistry exam, I lost marks because of a question that asks about the reaction between $\ce{HBr}$ and $\ce{C3H8}$. According to our teacher $\ce{...
3
votes
0answers
466 views

Why is the silver nitrate chemical test more favorable than that of sodium iodide?

Two tests to determine the presence of alkyl chlorides are the silver nitrate in 1% ethanol and sodium iodide in 15% acetone tests. These two tests both produce a precipitate when added to chloride ...
3
votes
1answer
320 views

What is the Chemical Compound that has a NFPA 704 (Fire Diamond) of 2-2-1-ox?

I recently saw this fire diamond configuration of: 2 - Flammability; 2 - Health; 1 - Reactivity; OX - Extra Information I have been attempting to find a database of terms, but after turning up with ...
9
votes
0answers
146 views

Aza-enolates: why no reaction at N

My understanding is that aza-enolates have an advantage over enamines in enolate-type alkylations because the reaction at N is less likely. As a result, unactivated electrophiles can be used (i.e. ...
-1
votes
1answer
368 views

Propylene Glycol as a water main anti-freeze

We are a young student science group looking for solutions to real world problems. We are currently working on ways to keep our city water mains from freezing in the winter. Our team is researching ...
3
votes
1answer
663 views

Reactivity of Aluminium Oxide

I know that Aluminium Oxide is an amphoteric substance meaning that it reacts with both acids and bases. I recently learned that Aluminium has very good corrosion resistance due to the "Aluminium ...
2
votes
0answers
533 views

Is benzyl chloride or allyl chloride more reactive?

What compound is more reactive, benzyl chloride [(chloromethyl)benzene] or allyl chloride (3-chloroprop-1-ene)? I know that both have a higher reactivity than alkyl and aryl chlorides.
5
votes
1answer
250 views

Why is the alkene a more stable species in this case?

How can we account for $\mathrm{S_N1}$ substitution in this case versus elimination in others? When we dehydrate alcohols, we usually carry out the reaction in concentrated sulfuric acid and at ...