Medikj
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Are cycloalkanes isomers of alkanes?
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Hellohsjakodsmka
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(Original post by Medikj)
Are cycloalkanes isomers of alkanes?
I think they are isomers of alkenes
I might be wrong
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5hyl33n
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(Original post by Hellohsjakodsmka)
I think they are isomers of alkenes
I might be wrong
Yes, that is right.
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Hellohsjakodsmka
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(Original post by 5hyl33n)
Yes, that is right.
Okay thanks haha
I might not fail a level chem next year! :ahee:
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Medikj
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(Original post by 5hyl33n)
Yes, that is right.
(Original post by Hellohsjakodsmka)
I think they are isomers of alkenes
I might be wrong
I know it may seem a dumb question, however, are cycloalkanes classified as alkanes? Or are they classified as alkenes?
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Deggs_14
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(Original post by Medikj)
I know it may seem a dumb question, however, are cycloalkanes classified as alkanes? Or are they classified as alkenes?
They are alkanes. Clue is in the name - cycloalkane.
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Hellohsjakodsmka
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(Original post by Medikj)
I know it may seem a dumb question, however, are cycloalkanes classified as alkanes? Or are they classified as alkenes?
It's not a dumb q dw
Alkanes I think
Not sure again
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Hellohsjakodsmka
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(Original post by Deggs_14)
They are alkanes. Clue is in the name - cycloalkane.
Thanks haha
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Medikj
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(Original post by Deggs_14)
They are alkanes. Clue is in the name - cycloalkane.
(Original post by Hellohsjakodsmka)
It's not a dumb q dw
Alkanes I think
Not sure again
Thank you!
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Pigster
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(Original post by Deggs_14)
They are alkanes. Clue is in the name - cycloalkane.
Alkanes have the general formula CnH2n+2.

Cycloalkanes have the general formula CnH2n.

Cylcoalkanes are not alkanes.
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Jamie_1712
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(Original post by Pigster)
Alkanes have the general formula CnH2n+2.

Cycloalkanes have the general formula CnH2n.

Cylcoalkanes are not alkanes.
This is wrong. They are a type of alkane actually because they are saturated, hence the name cycloalkane. They have no carbon - carbon double bonds. Hence do not have a reaction with bromine water, and do not turn it from brown to colourless. This mean they fit the definition of an alkane. They may have a different formula, but due to their saturation, they are alkanes.
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Deggs_14
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(Original post by Pigster)
Alkanes have the general formula CnH2n 2.

Cycloalkanes have the general formula CnH2n.

Cylcoalkanes are not alkanes.
Would they be considered as a saturated hydrocarbon then, of which cycloalkanes and alkanes both are?
Last edited by Deggs_14; 8 months ago
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Pigster
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(Original post by Jamie_1712)
This is wrong. They are a type of alkane actually because they are saturated, hence the name cycloalkane. They have no carbon - carbon double bonds. Hence do not have a reaction with bromine water, and do not turn it from brown to colourless. This mean they fit the definition of an alkane. They may have a different formula, but due to their saturation, they are alkanes.
To use your words against you:

Alcohols are saturated. They have no carbon - carbon double bonds. Hence do not have a reaction with bromine water, and do not turn it from brown to colourless. This mean they fit the definition of an alkane. They may have a different formula, but due to their saturation, they are alkanes.

The definition of alkane vs cycloalkane does not depend on properties.

IUPAC defines alkanes as "acyclic branched or unbranched hydrocarbons having the general formula CnH2n+2, and therefore consisting entirely of hydrogen atoms and saturated carbon atoms"

Do you know what acyclic means?
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Jamie_1712
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(Original post by Deggs_14)
Would they be considered as a saturated hydrocarbon then, of which cycloalkanes and alkanes both are?
Read my post, yes. However cycloalkanes are alkanes as the definition is to be saturated.

In year 2 A level chemistry you’ll learn about unsaturated alkanes, specifically benzene which is a super interesting molecule and has many unique properties.
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Pigster
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(Original post by Deggs_14)
Would they be considered as a saturated hydrocarbon then, of which cycloalkanes and alkanes both are?
Yes.

The name cycloalkane probably comes from the fact that they have similar properties and reactions to alkanes, but they aren't themselves alkanes.
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Jamie_1712
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(Original post by Pigster)
To use your words against you:

Alcohols are saturated. They have no carbon - carbon double bonds. Hence do not have a reaction with bromine water, and do not turn it from brown to colourless. This mean they fit the definition of an alkane. They may have a different formula, but due to their saturation, they are alkanes.

The definition of alkane vs cycloalkane does not depend on properties.

IUPAC defines alkanes as "acyclic branched or unbranched hydrocarbons having the general formula CnH2n+2, and therefore consisting entirely of hydrogen atoms and saturated carbon atoms"

Do you know what acyclic means?
Well no, because alcohols don’t only contain carbon and hydrogen, so that’s just irrelevant to the discussion.

I believe I may stand corrected. In any case, in an exam if you’re asked what type of molecule a ringed saturated hydrocarbon is, the answer would be cycloalkane.
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Deggs_14
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(Original post by Pigster)
Yes.

The name cycloalkane probably comes from the fact that they have similar properties and reactions to alkanes, but they aren't themselves alkanes.
I thought the “cyclo” part denoted the cyclic structure of the hydrocarbon, but that’s interesting to consider. Anyways thank you for clarifying
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Pigster
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(Original post by Jamie_1712)
Well no, because alcohols don’t only contain carbon and hydrogen
Your earlier description of alkanes did not include reference to C and H.

Chemistry is all about pedantic definitions and this is an example. Just because a name suggests one thing, doesn't necessarily mean it means it.
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Medikj
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(Original post by Pigster)
Your earlier description of alkanes did not include reference to C and H.

Chemistry is all about pedantic definitions and this is an example. Just because a name suggests one thing, doesn't necessarily mean it means it.
Name:  8368F996-9039-4B7C-A76B-DF9F9EF33406.jpg.jpeg
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Source: https://chem.libretexts.org/Bookshel...arbons/Alkanes

Wait, then why does this say they are? It’s a pretty reliable source
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Pigster
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(Original post by Medikj)
Source: https://chem.libretexts.org/Bookshel...arbons/Alkanes

Wait, then why does this say they are? It’s a pretty reliable source
For this kind of stuff, there is no higher power than IUPAC. They make the rules that we all abide by.

Your source contains a mistake, therefore.
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