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.
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Why is CH2Cl2 called as methylene dichloride and not methylidene dichloride, as it's a geminal dihalide? [duplicate]
Our book, mentions that geminal dihalides, are those having 2 halides on same carbon atom, and their common name is alkylidene halides.
In that case, CH2Cl2 has 2 chlorides on same carbon atom, ...
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Why are "vinylic" and "allylic" carbons named so?
I find it hard to remember which is "vinylic" and "allylic" carbon, so I feel it would be easier to remember if I know the reason why they are named so, like their word root ...
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What is the rate of hydration in the following compounds
I came across a question :
What is the order of rate of hydration in the following compounds:
My attempt to this question was checking the stability of carbocation. As III has a possibility of 3* ...
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Hydroxyl-Terminated Polybutadiene Structural Formula
Anyone know why there are parentheses and brackets in this skeletal formula? Also wondering if this representation gives a full chemical formula, or just the structure of a repeating hydrocarbon chain?...
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How to clean naphtha of non-saponifiable fats
My dad has been using naphtha to degrease some animal bones, which based on the MSDS is probably some random jumble of hydrocarbons, mostly heptanes. He's trying to be environmentally friendly so he ...
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Irregularities in the melting point of cycloalkanes
In the "Table of alkanes" part of the Wikipedia article for Alkane, in the graph melting point increases with increase in the number of carbons; but the increase is higher when going from an ...
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Reactivity towards electrophilic addition reaction among unsaturated cyclohexane derivatives
I am a class 8th student preparing for chemistry olympiad. I am having slight confusion regarding how to decide the reactivity towards electrophilic addition reactions. What should we give more ...
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What are disadvantages of methane or ammonia compared to dihydrogen for metal ore reduction?
Metallurgy, such as steel-making processes, require reducing agents to get rid of the oxygen in metal ores. Using fossil coal for this is a large source of $\ce{CO2}$ globally. Recently, I have read a ...
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Predict the products of organic reaction sequence
This is a reaction sequence involving alcohols, phenols, halides, alkenes ,alkanes etc , and the task is to identify all the compounds A to E
The few things I was able to identify :
The compound C ...
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Electrolysis of gasoline (or other uniform liquid hydrocarbon) [closed]
Electrolysis, when I usually search about it, is almost exclusively interested in splitting $\ce{H2O}$. However, looking at the Wikipedia article on electrolysis, it seems like it works for a bunch of ...
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Preparation of cycloalkanes [closed]
Is it possible to get cyclooctane from calcium suberate? Is this reaction similar to one when getting cyclohexane from calcium adipitate?
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Is neo-octane possible and if yes, what is its structure? [closed]
I know iso-octane is an exception and is 2,2,4-Trimethylpentane which intuitively contains both iso and Neo groups. But then what is the structure of neo-octane or even is it possible?
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What would be the product if ozonolysis of an alkene is done in the presence of water?
I have gone across several articles that have mentioned the below:
Alkenes on reaction with O3 and Zn/H2O or any other reducing agent gives aldehyde/ketone.
Alkenes on reaction with O3 and H2O2 gives ...
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Chlorination of 2-phenylbutane [closed]
When the compound is chlorinated on the extreme carbons, there is a chiral carbon in both the resulting compounds, which gives a total of 4 stereo isomers. When compound is chlorinated on 2nd or 3rd ...
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Chemical equation of wood to charcoal pyrolysis
The equation for the perfect burning of wood is approximately:
$$\ce{C_xH_yO_z + VOCs + O2 -> CO2 + H2O + volatiles + heat}$$
Where $\ce{C_xH_yO_z}$ represents the cellulose and lignin and VOCs are ...
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Preparation of alkane through decarboxylation by soda lime
Can we still prepare alkane through decarboxylation (using soda lime) if instead of using sodium salt of carboxylic acid, we use the carboxylic acid directly.
Because I have always seen the ...
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Is CD4 an alkane?
Can $\ce{CD4}$ or $\ce{CT4}$ be considered an alkane?
I know that an alkane is $\ce{C_nH_p}$ where $p = 2n + 2$. An alkane is considered a "hydro"carbon, i.e., a compound containing purely ...
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Which hydrogen in 3-ethynyltoluene is the most acidic?
Arrange the three types of hydrogens in 1‐ethynyl‐3‐methylbenzene in the order from the most acidic to the least.
From my understanding, the hydrogen on methyl would be the most acidic as the ...
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unexpected ozonolysis products: short chain alkanes (methan, ethane, propane) as reaction products when ozone reacts with organic matter
My question is which molecule or functional group reacts with ozone to yield short-chain alkanes?
Some background: I use ozone produced by an ozone generator with the aim to clean my vacuum instrument ...
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Flash point of naptha and propanol
I filled a Zippo lighter with 2-propanol and it lit up easily when the ambient temperature was around 6-7 degrees Celsius.
It was impossible to light it up when the temperature was around 3-4 degrees ...
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Aromaticity of [14]annulene
Our teacher had taught us that cis-trans-[10]annulene is non-aromatic. The reason he gave is due to repulsions between hydrogens, the structure is no longer planar
But later he told us that [14]...
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Burning Plastic: can it be done without harmful pollution? [closed]
Can plastic be melted, incinerated or recycled without emitting harmful gases and CO2? Specifically, can this be done without releasing gases harmful to humans?
This question pertains to the melting ...
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Are hydrocarbons compounds of hydrogen and carbon, or carbon and hydrogen?
Is it the same to say "Hydrocarbons are compounds of hydrogen and carbon." as saying "Hydrocarbons are compounds of carbon and hydrogen."
I got a B in my chemistry test just ...
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In combustion method for analysing molecular formula of gaseous hydrocarbon, is pressure of the gaseous mixture always constant?
I understand the we have to look at the volumes, but the fact that volume of a gas is directly proportional to the number of moles of the gas holds only at constant pressure. Also we are applying Gay-...
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Carbocation rearrangement with ring expansion
I was solving a particular question which landed me to a position where I have to decide whether the following ring expansion would take place or not by carbocation rearrangement:
If the expansion ...
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Reaction mechanism validity [closed]
Hey I was solving some questions i found this solution to a question
I'm confused, can alpha-hydroxy acids undergo dehydration??
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How can a molecule with a double bond on one side have a plane of symmetry, and thus, be achiral?
Does norbornene have a plane of symmetry? Is norbornene achiral or chiral?
I think norbornene is chiral since there is a double bond on the only one side. Thus, there is no plane of symmetry. The ...
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Why does 2,3 dichlorobutane have 2, and not 3, stereoisomers
I understand how and that the R,S and R,R stereoisomers are different.
But I don’t see why the R,R and S,S compounds are stereoisomers and not meso compounds with each other.
Online it says that ...
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What is the flash point of acetylene?
On episode s10e11 of the show Criminal Minds, a confrontation occurs in a freezer full of acetylene gas. In this confrontation, the main character confidently fires her gun because the freezer was &...
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Retrosynthesis of (1S,2R)‐1‐isopropyl‐2,4‐dimethylcyclohexane
I think that retrosynthesis of (1S,2R)‐1‐isopropyl‐2,4‐dimethylcyclohexane involves the opening of an epoxide, to control the regiochemistry in order to achieve the trans-configuration via an SN2 ...
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Why is active sec-pentyl group called so?
My teacher as well as Wikipedia — Pentyl group use the following names for the “pentyl” groups:
Group name
Structure with attachment point
1
active sec-pentyl
2
sec-pentyl
3
active pentyl
If a ...
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Is cyclobut‐3‐ene‐1,2‐diide aromatic?
I think cyclobut‐3‐ene‐1,2‐diide is non-aromatic since there are two sp3 carbons (carrying negative charge), but my source says it is aromatic. Why?
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What scientific and technical challenges prohibit the industrial use of the Sabatier reaction?
It seems that the Sabatier reaction solves the biggest problem of climate change — it does create clean gas and hydrogen fuel from the captured carbon dioxide and water (from melting ice).
$$\ce{CO2 + ...
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Kolbe's electrolysis reaction for alkenes' production
I came across a question in which the major product was asked for Kolbe's electrolysis of potassium salt of 2,3-dimethylbutane-1,4-dioic acid. The answer was given as trans-(but-2-ene). I couldn't ...
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Does sodium borohydride reduces alkyne? [closed]
Will an isolated Alkyne or an alkene be reduced using sodium borohydride ($\ce{NaBH4}$)?
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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 ...
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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 ...
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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 ?
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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 ...
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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 ...
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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 ...
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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 $\ce{CaC2}$...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
