CH241 Laboratory


CH241 Lab Section



Report for Experiment 5 – Nucleophilic Substitution Reactions


Use complete sentences, use the proper number of digits and/or significant figures, and include units. Erase all the words in italics and type your answers/information into this template (your text/answers shouldn’t be in italics).


Introduction and Experimental Procedure: State the scientific purpose(s) of the experiment. Also provide an overview of S N 1 and S N 2 reactions in a general sense (not your specific reactions). Describe the methods used. Give a brief general statement/description of the procedure and reference (as a footnote or an endnote) the experiment handout on the CH241 website. Avoid discussing specific data. Describe any changes from the written procedure (if any).


Results and Discussion : Write a series of paragraphs that include Figures/Tables to clearly present data. Include ChemBioDraw structures as needed to help the reader understand your results and discussion Your paragraphs should be as cohesive as possible (each paragraph should lead into the next, as opposed to a series of statements on independent topics).


Table “templates” are included if you wish to use them (or you can make your own). When citing results r efer to each Table/Figure with an explicit reference as necessary (e.g. see Table 1) in the relevant part of this section. Remember to include units.


In your cohesive discussion, make sure to include the following items and topics. Please erase the bullets from the list below when you erase the italicized words.


         Equations for your S N 1 and S N 2 reactions with ChemBioDraw structures (mechanisms are not required).

         Discuss the technique of Gas Chromatography, how it works, and how it was used for this experiment.

         Present and discuss the results of your experiments run under both conditions.  How did you analyze your reactions? What were the molar ratios of your products and how were they determined?  Do your results agree or disagree with what you might have predicted, and what were your expectations based upon?

         What other products (aside from water) might you expect from the two reactions?

         Why is it necessary to perform your substitution reactions under acidic conditions (i.e., why doesn’t the reaction work by reacting the halide anion and the neutral alcohol?)?


Conclusion: Approx. 2-5-sentences. Summarize the purpose of the experiment. Describe whether the experiment was successful (from your point of view), and what was learned/accomplished by carrying out the experiment.



Attachments: Attach gas chromatograms for both reactions (S N 1 and S N 2). Make sure to label your attachment (such as “Figure 1. Relevant caption for the attachment”) and remember to refer to it in the Results and Discussion section of your lab report. Labels on attachments can be hand written if needed.



Table Templates:


Thing 1

Thing 2










Table 1:  Write a table caption





Thing 1

Thing 2

Thing X



Thing Y



Thing Z




Table 2:  Write a table caption