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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: nemzy on January 19, 2005, 10:03:57 PM

Title: Hydrogenation of 1-Octene to n-Octene
Post by: nemzy on January 19, 2005, 10:03:57 PM

1) how many moles of h2 gas should be taken up by 1 octene in the courseof this reaction?


CH3-(CH2)5-CH=CH2  -> (H2PtCl6) -> NaBH4, C2H5OH, HCL -> CH3-(CH2)5-CH2-CH3

Answer is 2 right???

2) What volume does this correspond to at STP?

How can i solve this part?


3)  how many moles of molecular hydrogen are consumed per mole of the precatalyst (H2PtCl6) in order to convert it enterily to platinum metal?

Isnt this 2 also?? what is the diff between this and the moles of H2 gas for the question #1?

4)  How many moles of precataylst (H2PtCl6) are used in this reaction?

Again is isn't this 2??

My answers don't seem right and i am still a little dubios before submitting them...am i misunderstanding a simple concept here?

thanks

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: AWK on January 20, 2005, 01:52:45 AM

Each mole of octene needs 1 mole of H2 (one double bond)

H2PtCl6 + 2H2 = Pt + 6HCl

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: dexangeles on January 21, 2005, 05:17:20 PM

okies, call me *&^%^$ but what is the difference between 1-octene and n-octene?

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: movies on January 21, 2005, 07:53:52 PM

It must be n-octAne, otherwise the question doesn't make sense.

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: AWK on January 22, 2005, 02:52:01 AM

Octene(s) is more general name for all isomers of C8H16 with one double bond.
1-octene means hydrocarbon with normal chain (unbranched) and double bond at the first carbon atom.

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: movies on January 23, 2005, 01:33:10 PM

Yes, but the product must be n-octane.

At least I hope so, or else I really don't understand hydrogenation at all....

 :P

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: dexangeles on January 23, 2005, 11:20:59 PM

same here, that's what's getting me all confused

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: AWK on January 24, 2005, 06:47:01 AM

After hydrogenation of 1-octene, 2-octene, 3-octene or 4 octene we can obtain n-octane

Title: Re:Hydrogenation of 1-Octene to n-Octene
Post by: movies on January 24, 2005, 03:09:54 PM

Quote from: AWK on January 24, 2005, 06:47:01 AM

After hydrogenation of 1-octene, 2-octene, 3-octene or 4 octene we can obtain n-octane

Agreed.