Web Form Submission for Results from NMR using ACD Labs NMR Analyzer workup to find Keq for Hacac in Various Deuterated Solvents.

Experimental Chemistry I, CH 362 & 362H, Winter 2018

As soon as you have analyzed the integrations from the 500 MHz FTNMR and calculated a value for Keq in your assigned solvent, complete the following web form and submit your value for Keq.  We will then place all student results on a course web page so that you can get all the student data for 2014 to consider in the correlation analysis. 

Compare Keq values in different solvents for the keto-enol tautomerization for 2,4-pentandione (Hacac) from the class data.  You should base your comparison on the entire class results for 2018 and consider these results in light of the solvent properties (given on the web page, in class and in the lab manual)  You are certainly free to include other solvent properties in your analysis if you find that they are more helpful in rationalizing the behavior of Hacac.  A complete explanation of the correlation will be given in lecture. 

Your name:   

Section: TTh
WF

Your E-mail address:

Definition:  the equilibration is considered in the direction:

Hacac.gif (2737 bytes)

Enter the name for your deuterated solvent:    

 

 

Report as many of the following Keq ratios as you have data for but not everyone will have data for all ratios. Note that H/D equilibration will substatially decrease CH/CH2 integrals in solvents such as D2O or CD3OD. Everyone will have at least the methyl to methyl ratio.  Note: Values for Keq in the same solvent should be similar for all ratios.)
 		  

Based on [enol CH3] / [keto CH3] comparison, value for Keq to 3 significant figures  =   
 		  
Based on [enol CH3  / [keto CH2] comparison, value for Keq to 3 significant figures  = 
 		  
Based on [enol CH  / [keto CH2] comparison, value for Keq to 3 significant figures  = 
 		  
Based on [enol CH ]/ [keto CH3] comparison, value for Keq to 3 significant figures  = 
 		  
Based on [enol OH] / [keto CH3] comparision, value for Keq to 3 significant figures  = 

Thank you!

 

 

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Last updated: 12/15/2015
Comments to K. Gable