Questions tagged [hydrocarbons]

Hydrocarbons are compounds containing only hydrogen and carbon atoms. This tag should be applied when a saturated or an unsaturated hydrocarbon is the main focus. For aromatic hydrocarbons, use the tag [aromatic-compounds] instead. For halohydrocarbons or other functional derivatives, use [halides] or other relevant tags instead.

Filter by
Sorted by
Tagged with
-2 votes
1 answer
42 views

Does sodium borohydride reduces alkyne? [closed]

Will an isolated Alkyne or an alkene be reduced using sodium borohydride ($\ce{NaBH4}$)?
user avatar
1 vote
1 answer
50 views

How is the intermediate compound 2-chloropropan-1,3-diol is formed when hypochlorous acid is added to allyl alcohol in the preparation of glycerol?

The expected product is 3-chloropropan-1,2-diol since secondary carbocation is more stable than primary but it is not formed. I have surfed the internet a lot regarding this and none seems to be a ...
user avatar
-2 votes
0 answers
52 views

Why doesn't Phenol follow the pattern for C-13 NMR?

I find this C-13 NMR Of phenol really weird. It's weird because I would have expected that $a$ would be the most shifted, then $b$, then $c$ and finally $d$. After all, d is the furthest from the ...
user avatar
  • 1,404
1 vote
1 answer
125 views

Can eating soap protect you if you ingested radioisotopes? [closed]

In “Pass the Vegetables, Please”, the 71st episode of Gilligan's Island, Gilligan and the gang all ate seeds of radioactive vegetables, and the professor suggested eating soap. He says the ...
user avatar
  • 35
0 votes
0 answers
46 views

Why does 1-ethylidene-2,3-dimethylcyclopropane exhibit cis-trans isomerism?

I think the carbons 2 and 3 have different configuration according to the CIP rules which makes the groups different: Am I correct? Is there any official criteria regarding these cases ?
user avatar
  • 147
5 votes
0 answers
78 views

Systematic IUPAC name of buckminsterfullerane

Many of you have heard of buckminsterfullerEne, which is C60, also called the "buckyball". Well, there's also buckminsterfullerAne, which is C60H60. This is a buckyball that's fully ...
user avatar
  • 189
-1 votes
1 answer
68 views

What is the most stable cycloalkene? [closed]

I'm looking specifically at cyclopentene and cyclohexene. Supposedly, greater instability would lead to a more exothermic enthalpy of combustion. However, based on my data, cyclopentene is more ...
user avatar
  • 3
0 votes
1 answer
81 views

Is it possible for a long carbon chain to have both acidic and basic groups?

I was reading about a zwitter ion and I had a thought that is the same possible for an acidic and basic groups. Like a very long carbon chain with a basic group and an acidic group on either sides, I ...
user avatar
-3 votes
2 answers
160 views

Why is methane not called carbon tetrahydride?

If aluminium hydride, $\ce{AlH3}$, is called "hydride" because it contains elemental hydrogen and sodium chloride, $\ce{NaCl}$, is called "chloride", and calcium carbide $\ce{CaC2}$...
user avatar
0 votes
1 answer
78 views

Are alkynes weakly polar?

I was reading about physical properties of alkynes in my Chemistry textbook. One of the sentence states Alkynes are weakly polar in nature. I didn't understand how alkynes are weakly polar, so I ...
user avatar
1 vote
1 answer
57 views

How does Hyperconjugation stabilize a Carbon Free Radical? [closed]

I tried drawing the resonance structures but just cannot see how donating two electrons to a carbon that only needs one electron make it more stable? I stumbled upon this question asked years ago ...
user avatar
0 votes
1 answer
66 views

Is acetone an effective solvent for bitumen?

Japanning is an age old process of protecting metal surfaces by applying several successive layers of a syrup-like black coating and then baking it to a hard and durable finish. It was often applied ...
user avatar
-1 votes
1 answer
34 views

How holes in cooking burner help it to perform complete combution but candle thread can't by providing sufficient oxygen supply?

Recently I was introduced to organic chemistry for the first time. In the section of complete and incomplete combustion of carbon compounds, they provide example of two different objects, namely a ...
user avatar
3 votes
1 answer
79 views

Safe disposal of pyrolysis side products in production of wood gas

I am in the process of building a pyrolysis chamber producing wood gas for use in a generator. The process involves heating a batch of biomass (wood) in absence of oxygen (air) in a closed vessel, and ...
user avatar
  • 139
-1 votes
2 answers
117 views

Could an LPG gas ever become lighter than air?

Both of the LPG gases, propane ($\ce{C3H8}$) and butane ($\ce{C4H10}$) are heavier than air. Propane is $1.55$ times heavier and butane is $2.08$ times heavier. Is same-temperature air always lighter ...
user avatar
0 votes
1 answer
136 views

Kharasch Peroxide effect with heating

From what i have learnt, kharasch Peroxide effect is only applicable for HBr. The reason for this is for the other halogens, HCl and HI the propagation steps in the radical mechanism are endothermic. ...
user avatar
-2 votes
1 answer
67 views

How does soap help in cleaning clothes and rinsing off oil and grease?

When we say that we agitate clothes so that grease particles get separate out from clothes as ionic part of hydrocarbon chains of soap is attached to water and non polar part of chain is dissolved in ...
user avatar
0 votes
2 answers
47 views

How substituted/contaminated can a hydrocarbon be to still be considered a hydrocarbon? [closed]

I have a doubt about any type of hydrocarbon with a Carbon-Heteroatom bond, instead of a C-H bond like oxygenated, nitrogenated, brominated hydrocarbons. My question is: how polluted can they be to ...
user avatar
  • 11
2 votes
0 answers
44 views

Would a PNG geyser work on biogas?

I am trying to understand if a water heater designed to run on piped natural gas (PNG) could be powered by biogas without any modifications. Typically, these geysers have a battery-powered ignition ...
user avatar
-1 votes
1 answer
44 views

Reactivity of Alkenes with HBr [closed]

I am new in the Organic Chemistry (World of Reactions). I had got one question in my test. But, when I had seen it, I got no proper logic to tick the correct answer, and then when I saw solution, then ...
user avatar
-1 votes
1 answer
74 views

Given type and number of carbon atoms and degree of unsaturation of a hydrocarbon, write structural formula

Write a structural formula of the hydrocarbon that contains 4 primary carbon atoms, 2 ternary carbon atoms, 3 quaternary carbon atoms, and has degree of unsaturation 3. This has been given at the ...
user avatar
  • 107
0 votes
1 answer
70 views

Why pyrolysis of C6H10 doesn't give C5H10 + CH4 [closed]

In my book it's given pyrolysis of C6H14 gives C6H12 + H2 Or C4H8 + C2H6 Or C3H6+C2H4+ CH4 ( as it gives atleast one alkene) but there are other possible alkenes as well such as C5H10.
user avatar
-2 votes
1 answer
71 views

Boiling and melting points of hydrocarbons [closed]

What happens while boiling and melting hydrocarbons? Which bonds are broken? When we compare the boiling point (b.p.) and melting point (m.p.) of certain hydrocarbons the order is inverted. For ...
user avatar
0 votes
0 answers
36 views

Why do hydrocarbons give out a blue flame on complete combustion? [duplicate]

In complete combustion of hydrocarbons the colour of the flame is blue. But what is the reason behind the flame being blue and not green or black or any other colour? Edit: I've searched the web for ...
user avatar
  • 11
2 votes
0 answers
38 views

Why is the the temperature change due to the combustion of paraffin wax so high (10000 Kelvin)? [closed]

I'm trying to work out the temperature change (I got something like 10k Kelvin,hotter than the Sun's core...) caused by the combustion of paraffin wax which has a molar enthalpy of combustion $E^{wax}...
user avatar
0 votes
0 answers
26 views

Why does the trend of the enthalpy of reaction per atom of carbon in hydrocarbons approach a near-constant value?

I was looking at trends for enthalpies of hydrocarbons for a high school project and found an interesting paper regarding it, stating that the enthalpy per carbon atom approaches a constant. I'm ...
user avatar
  • 1
4 votes
1 answer
198 views

Why is carbon tetrachloride more stable than methane?

When a mixture of methane and chlorine is exposed to ultraviolet light – typically sunlight – a substitution reaction occurs and the organic product is chloromethane. However, the reaction doesn't ...
user avatar
  • 69
0 votes
0 answers
22 views

Branching Cyclic Hydrocarbons and Comparing Boiling Point

I am currently in organic chemistry and working on comparing the boiling and melting points of hydrocarbons. The question, in particular, is drawing a comparison between benzene and toluene's relative ...
user avatar
  • 1
0 votes
1 answer
95 views

Can sodium metal deprotonate terminal hydrogen atom from propyne to form propynide?

I've read that sodium metal is used to form ethynides but for forming propynide, they have used $\ce{NaNH2}$. Is there some reason for not using sodium metal for propynides as well? Source: Chemistry ...
user avatar
9 votes
3 answers
825 views

Does Phenylacetylene undergo side chain oxidation with hot alkaline Potassium permanganate?

This question was asked in my book: To my knowledge, side chain oxidation with KMnO4 occurs only when a benzylic hydrogen is present. However this doesn't contain a benzylic hydrogen and hence ...
user avatar
  • 123
2 votes
1 answer
118 views

Mission: Impossible? Hydrocarbons in an aqueous liquid (e.g. humulene in beer)

Your mission, should you decide to accept it, is to describe how hydrocarbons can be stably mixed into a water-based liquid such as beer, as in this question. According to the usual textbook wisdom, ...
user avatar
  • 39.4k
3 votes
0 answers
23 views

Conversion of allyl alcohol to 2-chloro propanediol with HOCl [duplicate]

going through the preparation of tri hydric alcohol(glycerol), i came across this reaction i.e. preparation of glycerol from propene. In the first step of this reaction, we did allyl substitution with ...
user avatar
5 votes
2 answers
193 views

Why do alkenes (olefins) burn hotter than alkanes (paraffins), even though alkanes are denser and more hydrogen-rich?

Burning hydrogen releases more total energy than combusting carbon, and all alkanes are denser as well, so why are flame temperatures for alkene molecules higher than their equivalent alkanes? P.S.: ...
user avatar
  • 1,653
5 votes
1 answer
1k views

How much CO2 is produced when burning 1GJ of Natural Gas

Background I am trying to determine how many kg of $\ce{CO2}$ are released when burning 1 GJ of natural gas. What I've tried I have very little chemistry knowledge, but google led me to these two ...
user avatar
11 votes
2 answers
769 views

IUPAC naming for a ring system containing different ring structures

Regarding the IUPAC naming convention for compounds in which one ring is more highly $\pi$-conjugated than the other ring but contains fewer carbon atoms: I can name this compound as either: (a) 1-[...
user avatar
2 votes
0 answers
104 views

Why is the enthalpy of formation of 2,2-dimethylpentane larger than that of 2,2,3-trimethylbutane?

Firstly, it is commonly known and taught that branched alkanes are more stable than linear ones, and so have larger enthalpies of formation. But why is that the case? Are there some steric ...
user avatar
  • 37
4 votes
1 answer
221 views

What is the isomeric relation between bicyclo and spiro hydrocarbons?

Take for example octahydropentalene (bicyclo[3,3,0]octane) and spiro(3.4)octane: I would think that they are chain isomers of sort but according to nomenclature counting rules, they are both 8-carbon ...
user avatar
  • 1,419
0 votes
2 answers
90 views

Is a hydrocarbon necessary for combustion? [closed]

Oxygen, heat and fuel are essential for combustion. What counts as a fuel? Is a hydrocarbon essential for combustion? Is combustion, say, of magnesium really combustion? And what's the difference ...
user avatar
4 votes
1 answer
254 views

dehydration of an alcohol (3-methyl-1-phenylbutan-2-ol)

I was thinking of dehydrating this alcohol: 3-methyl-1-phenylbutan-2-ol Its structure is: My concern is which of the following would it form: The problem is that the first one comes from a stable ...
user avatar
1 vote
0 answers
39 views

Photobromination of cyclohexene

During bromination of cyclohexene in the presence of hv via free radical mechanism, there are two allylic carbons. Why does the major product have only one Br an not a Br on either side of double bond....
user avatar
  • 65
0 votes
3 answers
102 views

Isomers of a Cycloalkane [closed]

What I know: All alkanes are saturated hydrocarbons with the general formula, $C_nH_{2n+2}$ All alkenes are unsaturated hydrocarbons with the general formula, $C_nH_{2n}$ What's Confusing Me: This ...
user avatar
  • 178
2 votes
1 answer
37 views

Is diethyl and methyl preferred over an ethyl and an isopropyl group as substituents when both give the same longest chain? [duplicate]

According to what I took (look for the longest chain, start close to the branches, etc etc) I see two paths I could follow to give me a hexane. One where you go through the carbon in the methyl, and ...
user avatar
1 vote
0 answers
64 views

Why is cyclopropyl carbanion more stable than propyl carbanion [duplicate]

A problem was given in which the order of rate of decarboxylation was asked for the compounds cyclopropane carboxylic acid and and butanoic acid. It's known that the rate here depends on the stability ...
user avatar
3 votes
0 answers
186 views

What happens to the 2s orbital in carbon-hydrogen bonds? [closed]

I was taught in high school that carbon atoms by themselves are capable of establishing covalent bonds with with as far as four hydrogens atoms. Nowadays, trying to understand the topic in-depth, I ...
user avatar
0 votes
0 answers
35 views

Does incomplete combustion produce carbon dioxide at first? [duplicate]

I know that the incomplete combustion of a hydrocarbon produces $\ce{CO}$ or sometimes $\ce{C}$ if the amount of oxygen is very limited, but I was wondering if at first $\ce{CO2}$ is produced and only ...
user avatar
11 votes
1 answer
797 views

Does the largest known cycloalkane contain 288 carbon atoms?

If you Google "largest known cycloalkane", you will find this result: For context, there has been discussions on "largest known alkane": Largest alkane having a given alkane as ...
user avatar
  • 22.2k
5 votes
0 answers
77 views

What product will be formed from the side chain oxidation of 4‐ethyl‐1,1‐dimethyl‐3,4‐dihydro‐2H‐naphthalene?

Benzylic hydrogen is required for the side chain oxidation of benzene. But for this compound the top branch connected to the benzene ring does not have a benzylic hydrogen. So, will the top branch be ...
user avatar
  • 132
1 vote
1 answer
264 views

Why is the tropylium anion non-aromatic? [duplicate]

Recently I came across a question asking which compounds are anti-aromatic. This was one of the options: I’m confused as this is not an answer. I think the lone pair electrons on the carbanion ...
user avatar
  • 435
2 votes
2 answers
189 views

Mechanism of combustion of hydrocarbons [duplicate]

While this question comes close, it doesn't quite answer my question. Adding heat to oxygen & a hydrocarbon breaks the atoms apart and they reform into carbon dioxide and water. I get that. I want ...
user avatar
  • 201
7 votes
0 answers
121 views

Is a hydrocarbon bio-battery feasible?

Hydrocarbons have some of the highest energy densities and specific energies of any chemical fuel. Unfortunately, our primary use of them is in thermal engines, whose efficiency is limited by Carnot'...
user avatar

1
2 3 4 5
9