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Topic: [Solved]How to know the number of hydrogens in saturated hydrocarbon ?  (Read 2654 times)

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Offline Umbrila

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[Solved]How to know the number of hydrogens in saturated hydrocarbon ?
« on: April 12, 2016, 02:55:45 PM »
I have a structural formula and I need to write the amount of hydrogen in each carbon. Its name is 3, 3 - dimethylhexane.



What is the way to find out the amount of hydrogen ? It doesnt seem to have the same amount as just a hexane.
« Last Edit: April 12, 2016, 04:54:05 PM by Umbrila »
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Offline mikasaur

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Re: How to know the number of hydrogens in saturated hydrocarbon ?
« Reply #1 on: April 12, 2016, 03:04:46 PM »
How many valence electrons does carbon have? How many bonds do you think it likes to form?
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Offline AWK

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Re: How to know the number of hydrogens in saturated hydrocarbon ?
« Reply #2 on: April 12, 2016, 03:50:19 PM »
Use general formula for saturated hydrocarbons.
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AWK

Offline Umbrila

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Re: How to know the number of hydrogens in saturated hydrocarbon ?
« Reply #3 on: April 12, 2016, 04:40:15 PM »
4 electrons, so 4 hydrogens ? If I got it right, in the structural formula, from left to right, itll be CH3--CH2--C--CH2--CH2--CH3 ?
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Offline mikasaur

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Re: How to know the number of hydrogens in saturated hydrocarbon ?
« Reply #4 on: April 12, 2016, 04:45:44 PM »
Yep! Carbon "wants" to form four bonds. That can be from four single bonds, two double bonds, or a single bond and a triple bond.

Your structure is correct (assuming the C in the middle is bonded to the two methyl groups). Good job!
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Offline Umbrila

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Re: How to know the number of hydrogens in saturated hydrocarbon ?
« Reply #5 on: April 12, 2016, 04:53:24 PM »
Ok, thank you very much !
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