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November 08, 2025, 04:08:09 am
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Author Topic: Hydrocarbon help  (Read 3042 times)  Share 

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GoodGuys

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Hydrocarbon help
« on: May 05, 2009, 07:20:28 pm »
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Hi,

hey guys whats the difference between MethlyButane and butane?

What would be the difference when drawing the structure

and what happens when alkyl names are infront of alkanas and alkenes???
How does it change the structure?
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TrueTears

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Re: Hydrocarbon help
« Reply #1 on: May 05, 2009, 07:21:41 pm »
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Butane is

where as methylbutane has a methyl ie side chain attached to the butane

1. is the structure 1-methylbutane, but this should actually be called pentane (longest chain is 5 carbons)

2. is the structure of 2-methybutane, the name is also 2-methybutane


« Last Edit: May 05, 2009, 07:27:15 pm by TrueTears »
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GoodGuys

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Re: Hydrocarbon help
« Reply #2 on: May 05, 2009, 07:25:02 pm »
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Quote from: TrueTears on May 05, 2009, 07:21:41 pm
Butane is

where as methylbutane has a methyl ie side chain attached to the butane

what do you mean exactly?
attached?
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TrueTears

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Re: Hydrocarbon help
« Reply #3 on: May 05, 2009, 07:26:58 pm »
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See the diagram I drew, how for number 2 there is a group attached to the 2nd carbon counting from the left. That is known as a methyl group.
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GoodGuys

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Re: Hydrocarbon help
« Reply #4 on: May 05, 2009, 07:28:31 pm »
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ow so you mean you jst add a Ch3 to the structure?

but how do you know exactly where to add it?
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d0minicz

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Re: Hydrocarbon help
« Reply #5 on: May 05, 2009, 07:29:23 pm »
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depends on the name
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GoodGuys

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Re: Hydrocarbon help
« Reply #6 on: May 05, 2009, 07:29:58 pm »
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you have 12 hydrogens?..

the book answer shows only 11 hydrogens//
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d0minicz

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Re: Hydrocarbon help
« Reply #7 on: May 05, 2009, 07:31:11 pm »
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For pentane???
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TrueTears

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Re: Hydrocarbon help
« Reply #8 on: May 05, 2009, 07:31:37 pm »
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Quote from: GoodGuys on May 05, 2009, 07:28:31 pm
ow so you mean you jst add a Ch3 to the structure?

but how do you know exactly where to add it?
Depends on the name, if it is 2-methylbutane it means it's on the 2nd carbon atom of the LONGEST carbon chain. If it is 3-methylbutane, same principle, if it is 4-methyl, 5-, 6-... same principle.
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TrueTears

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Re: Hydrocarbon help
« Reply #9 on: May 05, 2009, 07:32:11 pm »
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Quote from: GoodGuys on May 05, 2009, 07:29:58 pm
you have 12 hydrogens?..

the book answer shows only 11 hydrogens//
12 hydrogens on what?
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GoodGuys

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Re: Hydrocarbon help
« Reply #10 on: May 05, 2009, 07:37:59 pm »
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Quote from: TrueTears on May 05, 2009, 07:21:41 pm
Butane is

where as methylbutane has a methyl ie side chain attached to the butane

1. is the structure 1-methylbutane, but this should actually be called pentane (longest chain is 5 carbons)

2. is the structure of 2-methybutane, the name is also 2-methybutane

(Image removed from quote.)


you know for diagram 2 you did,

yeh u did it write, im thinkign the book jst did an error. there missing 1 hydrogen. i think,

im an idiot, im doing long overdue homework, i was supposed to do this 5 weeks ago.
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TrueTears

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Re: Hydrocarbon help
« Reply #11 on: May 05, 2009, 07:40:21 pm »
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Must have 12 hydrogens or else it'd be missing a bond.

Yeah, these naming form the basis of organic chemistry, need to get them under your belt ASAP
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PhD @ MIT (Economics).

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GoodGuys

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Re: Hydrocarbon help
« Reply #12 on: May 05, 2009, 07:42:25 pm »
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Ok done, this is so easy....
thanks guys
a karma each for the help!

but not you dominicz, nah jst kidding.
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GoodGuys

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Re: Hydrocarbon help
« Reply #13 on: May 05, 2009, 07:43:09 pm »
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Quote from: TrueTears on May 05, 2009, 07:40:21 pm
Must have 12 hydrogens or else it'd be missing a bond.

Yeah, these naming form the basis of organic chemistry, need to get them under your belt ASAP

ahhh dont matter for me, i hate chem, last subject !! :d :d
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GoodGuys

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Re: Hydrocarbon help
« Reply #14 on: May 05, 2009, 07:47:02 pm »
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OW OW, another questionnn...


is there a difference between 1- chloropropane and chloropropane?

what does that 1 symbolise? i know what 2 is but how bout 1?
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