{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

C2510 EAS Lab F 2012b

C2510 EAS Lab F 2012b - Chemistry 2510 Introduction to...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 2510 Introduction to Experimental Organic Chemistry Fall 2012 Experiment #9 Electrophilic Aromatic Substitution Laboratory Notebook : You need to summarize your experimental plan in your lab notebook. Be sure to include a table of all reagents and compounds that will be used in this experiment. Laboratory Observations: Be sure to record any observations during the laboratory. You must record exactly how much of the starting materials you started with and the weight of the isolated product. Results and Conclusions : Calculate a % yield for your reaction and identify the product(s) through IR spectroscopy and melting points. Relevant Reading: Reflux, pp 31-32, Melting Points, pp 49-53, IR Spectroscopy, pp 66- 76 and Running a Reaction, pp 191-193. Background: During this laboratory, you will perform an electrophilic aromatic substitution reaction between 1,4-dimethoxybenzene and an alcohol. Half of the class will use 2-methyl-2- butanol (reaction 1) and the other half of the class will use racemic 3-methyl-2-butanol (reaction 2). You will determine the product of each reaction using IR, melting point and physical observation. Using the product structures, you will propose a mechanism for each reaction. Reaction 1: O O + H O H 2 SO 4 O O H Reaction 2: O O + H 2 SO 4 O O H O H
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Procedure: Safety: Caution: Sulfuric acid is a strong acid and will burn your skin and eyes. You must wear gloves and eye protection while using sulfuric acid (and during the rest of the laboratory as well). Immediately clean up all small spills with 5% sodium bicarbonate. Upon contact with skin, immediately flush with water for at least 20 minutes. Then seek professional attention. Synthesis Weigh approximately 1.50 g of 1,4 - dimethoxybenzene into a 50-mL Erlenmeyer flask containing a 1” stir bar and record the exact mass of the sample in your laboratory notebook. Add 5 mL of acetic acid followed by 3.5 mL of either 2-methyl-2-butanol or DL-3-methyl-2-butanol. Cover the Erlenmeyer flask with a watch glass when possible to minimize the odor in the lab.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 4

C2510 EAS Lab F 2012b - Chemistry 2510 Introduction to...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online