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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: crichtonracing on April 19, 2009, 08:45:32 PM

Title: Structural formula
Post by: crichtonracing on April 19, 2009, 08:45:32 PM
How do I write a complete structural formula for this:

NH3 + C4H9COOH -> C4H9CONH2 + H2O
Title: Re: Structural formula
Post by: UG on April 19, 2009, 08:59:05 PM
What do you mean?   ??? Can you elaborate?
Title: Re: Structural formula
Post by: UG on April 19, 2009, 09:19:26 PM
You mean like:

NH3 (http://itech.dickinson.edu/chemistry/wp-content/uploads/2008/04/molecular-structure-of-ammonia.png) + C4H9COOH (http://www.chemcool.com/regents/organicchemistry/image004.gif)  :rarrow: C4H9CONH2 (http://www.cdli.ca/courses/chem2202/unit03_org03_ilo05/pentanamide.gif) + H2O (http://upload.wikimedia.org/wikipedia/commons/8/84/Eau_lewis.png)

Title: Re: Structural formula
Post by: crichtonracing on April 19, 2009, 10:00:40 PM
See what I mean...this book is super confusing. "Write a complete structural formula equation for each of the following reactions:"

1. NH3 + C4H9COOH :rarrow: C4H9CONH2 + H2O
2. C5H12 + O2 :rarrow: CO2 + H2O
Title: Re: Structural formula
Post by: crichtonracing on April 19, 2009, 10:03:03 PM
This question has stopped me from working on my homework for 2 weeks PLEASE HELP ME
Title: Re: Structural formula
Post by: UG on April 19, 2009, 10:05:16 PM
In that case I believe you have to draw their structures like in my second post. 

I.e, drawn like shown in the link: C4H9COOH (http://www.chemcool.com/regents/organicchemistry/image004.gif) 
Title: Re: Structural formula
Post by: crichtonracing on April 19, 2009, 10:20:28 PM
But it says "write," this is so confusing. Am I overthinking this stuff? Would I have to draw out everything for that reaction?


                H        H  H  H  H  =O
example: H N + H  C  C  C  C   C   OH  :rarrow:  etc..
                H        H  H  H  H
Title: Re: Structural formula
Post by: UG on April 19, 2009, 11:13:50 PM
Yes, I believe that is what you have to do.  :)
Title: Re: Structural formula
Post by: AWK on April 20, 2009, 01:12:05 AM
Organic chemist usually use a semistructural formulas, eg:
NH3 + CH3CH2CH2CH2COOH = CH3CH2CH2CH2CONH2 + H2O
Note - pentanoic acid has a few structural isomers
Look at Wikipedia
Title: Re: Structural formula
Post by: cliverlong on April 20, 2009, 03:56:29 AM
Does the following help?

http://www.chemguide.co.uk/basicorg/conventions/draw.html

Clive
Title: Re: Structural formula
Post by: xtine on May 11, 2009, 02:53:48 PM
Hello,

I'm working on this exact same question! It's driving me insane! I was wondering if you had any luck with figuring it out? I was doing so well in units 1 and 2...Now I'm completely STUCK! Please help if you can!?

Write a complete structural formula equation for each of the following reactions. First, name the reaction, and then name the reactants and products.

a) C3 H6 + Cl2 (g) ---> C3 H6 Cl2

b) NH3 + C4 H9 COOH ---> C4 H9 CONH2 + H2O

c) C5H12 + O2 ---> CO2 + H2O