Organic Chemistry Hantzch Synthesis

AI Thread Summary
The discussion focuses on the Hantzsch synthesis in organic chemistry, specifically addressing a homework problem related to the reaction mechanism. Participants highlight the necessity of ammonia in the reaction and debate whether to use 3-oxobutanenitrile or butanoyl cyanide as reactants. A reference to the Wikipedia page on Hantzsch pyridine synthesis is suggested for understanding the functional groups involved. The conversation emphasizes the importance of identifying the correct reactant for successful synthesis. Overall, the thread aims to clarify the mechanisms and choices in the Hantzsch synthesis process.
harrietstowe
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Homework Statement



http://img51.imageshack.us/img51/9563/chem3.png

Homework Equations





The Attempt at a Solution


I know the answer has to be a or c because you need the ammonia to make this reaction happen but I don't know whether you would want to use 3-oxobutanenitrile or butanoyl cyanide. Thanks
 
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harrietstowe said:

Homework Statement



http://img51.imageshack.us/img51/9563/chem3.png

Homework Equations





The Attempt at a Solution


I know the answer has to be a or c because you need the ammonia to make this reaction happen but I don't know whether you would want to use 3-oxobutanenitrile or butanoyl cyanide. Thanks

Consider the mechanism at e.g. http://en.wikipedia.org/wiki/Hantzsch_pyridine_synthesis - can you label the various functional groups?
 
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Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
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