Chemicals Essay

1798 words - 8 pages

The Diels-Alder Reaction of
Anthracene with Maleic Anhydride
The Diels-Alder reaction is a member of a class of reactions called cycloadditions. The reaction involves three π bonds, two from the diene and one from the dienophile in a concerted reaction to form a six-membered ring. Since the reaction involves four π electrons in the diene and two π electrons from the dienophile, it is sometimes referred to as a 4 + 2 cycloaddition.

Normal Diels-Alder reactions are favored by electron donating groups on the diene and electron withdrawing groups on the dienophile. The diene must be capable of achieving an s-cis conformation to generate the cis double bond in the cyclohexene product. ...view middle of the document...

Obtain and wear goggles. Protect your arms and hands by wearing a long-sleeve lab coat and gloves. Conduct this reaction in a fume hood.

2. Weigh out 0.80 g of anthracene and 0.40 g of maleic anhydride and transfer the reagents into a 50 mL round bottom flask containing a stir bar. Record both masses to the nearest 0.01 g.

3. Add 10 mL of xylene to the round bottom flask. CAUTION: Xylene is flammable. Keep away from open flames and hot plates.

4. Set up a reflux with the condenser and a drying tube, making sure to clamp the flask and condenser securely. Remember to grease the joints to prevent the glass from sticking.
Note: Maleic anhydride is water sensitive and the drying tube will help prevent water in the air from entering the flask.

5. Heat the reaction mixture using a heating mantle to reflux (~180°C) for approximately 30 minutes. Monitor the temperature using a Temperature Probe or thermometer.

6. While waiting, prepare two ice water baths using two 250 mL beakers.

7. Obtain approximately 5 mL of xylenes in the 100 mL beaker. Place the beaker in the ice water bath to cool.

8. After 30 minutes, let the reaction flask warm to room temperature. Wait at least 15 minutes for the flask to warm to room temperature. Then, place the flask in the second ice water bath for 10 minutes. You should observe crystallization at this point.

9. Collect the solid.

a. Weigh the filter paper and record the mass to the nearest 0.01 g.
b. Set up a vacuum filtration with the Büchner funnel.
c. Filter the solid and wash the solid with ~5 mL of cold xylene.
d. Place the filter paper containing the solid on a watch glass and gently direct a stream of air (low flow) to thoroughly dry the solid.

10. Weigh the filter paper and dried product. Record the mass to the nearest 0.01 g. The sample should be completely dried before taking a melting temperature.

Part II Test the Melting Temperature

11. Obtain a small amount of your product. The solid should be in a powdered form. If it is not, use a mortar and pestle to carefully grind the solid to a powder.

12. Prepare a sample for melting.

a. Pack a capillary tube 3–4 mm (~1/8 inch) deep with your sample by inserting the open end into a small pile of the solid. A small amount of the solid will be pushed up into the tube.
e. Tap the closed end of the capillary tube on the table top to compress the sample into the closed end.
f. Check the control knob on the Melt Station to confirm that it is in the Off position.
g. Carefully insert the capillary tube of solid into one of the sample holders of the Melt Station.

13. Connect the Melt Station power supply to a powered electrical outlet.

14. Connect the Melt Station sensor cable to LabQuest or to a computer interface.

15. Start the data-collection program, then choose New from the File menu. You are now set up to take melting temperature data for up to 20 minutes.

16. In the first trial, you will...

Other Papers Like Chemicals

Victoria Chemicals Corporate Finance Report

3957 words - 16 pages Introduction The following report shows that the proposal of the modernisation project should obtain funding from the corporate headquarters of Victoria Chemicals. The project has an initial outlay of GBP12 million to renovate and rationalise the polypropylene production line at Merseyside plant. This is done in order to make up for deferred maintenance and exploit opportunities to achieve increased efficiency. This report will

Dangers Of Chemicals In Household Products

2427 words - 10 pages Dangers of Chemicals Found in Household Products SD Western Governors University Student ID Dangers Of Chemicals Found In Household Products Many household products that we use daily and are very important in our homes, work environments and schools have become a health risk. This is because many of these household products we use to keep these places clean and to maintain a good health contain toxic chemicals. If

Chemicals Tests For Anions In Various Salts

595 words - 3 pages Chemicals Tests for Anions in Various Salts APPARATUS Spatula Test tubes and racks Pipettes Chemicals used Hydrochloric acid Nitric acid solution Barium chloride (harmful) Silver nitrate solution Metal salts used for testing Potassium chloride (KCI) Iron chloride (FECI3) Sodium sulphate (NASO4) Calcium carbonate (CACO3) Lead carbonate (PBCO3) Tap

Diamond Chemicals

588 words - 3 pages Teletech Case After careful review of the Teletech case I think that Rick Phillips thought on the method to calculate hurdle rate or WACC is the most aligned with industry standards and would be the most financially beneficial to the company overall. The current method that Teletech Corporation is using for hurdle rate is an overall average for the company; all segments combined using an averaged beta for the company, regardless of the risk of

Global Top 100 Specialty Chemicals Companies Market Research Report

1009 words - 5 pages Global Top 100 Specialty Chemicals Companies Market Research Report Did you know? - Anthony Fitzpatrick is President of Corporate Development at Croda International Plc.  - Platform Specialty Products Corporation continually seek opportunities to act as an acquirer and consolidator of specialty chemical businesses on a global basis.  - On October 1, 2015, the H.B. Fuller Company announced that it had appointed the Horn Company

Victoria Chemicals B

1632 words - 7 pages In early January 2001, the senior management committee of Euroland Foods was to meet to draw up the firm’s capital budget for the new year. Up for consideration were 11 major projects which totaled more than EUR 316 million. However, the board of directors had a spending limit on capital projects of only EUR 120 million. Thus, the big challenge for senior managers of Euroland Foods was to allocate funds among a range of compelling

Waterproofing Chemicals Market Size, Application Analysis, Regional Outlook, Trends, Competitive Scenario and Forecasts, 2012 to 2020

617 words - 3 pages roofing system is expected to have a positive impact on market growth over the next seven years. Building structures are anticipated to remain fastest growing application segment on account of increasing government expenditure on infrastructure improvement in Brazil, India, China, Mexico and Saudi Arabia. Asia Pacific was the largest waterproofing chemicals market, accounting for over 40% of market revenue in 2014. Growing housing sector in

Poisoning America - Describes The Harmful Effects Of Chemicals In American Food And The Corrupt Food Industry That Has Taken Over The Country. Includes Works Cited List

854 words - 4 pages lack of physical activity and exercise, but even people who exercise regularly are becoming ill. Not only people who are exercising regularly but people who are supposedly eating healthy foods are also getting diseases. People say it can be in their genes but I believe that if they want to than they can still prevent it. Technology has become a major part in the food industry today where chemicals have changed the way food is made, prepared and

Petroleum Additives Markets in China

541 words - 3 pages -term forecasts through 2018 and 2023 are presented. Major producers in China are profiled. table Of Content i. Introduction report Scope And Methodology executive Summary ii. Business Environment economic Outlook key Economic Indicators industrial Output population And Labor foreign Investment foreign Trade financial And Tax Regulations banking System And Regulations foreign Exchange taxes, Tariff And Custom Duties iii. Oilfield Chemicals

Hazard Communication

910 words - 4 pages ]. Identifying hazardous chemicals A list is attached to this plan that identifies all hazardous chemicals with a potential for employee exposure at this workplace. [Attach list]. Detailed information about the physical, health, and other hazards of each chemical is included in a Safety Data Sheet (SDS); the product identifier for each chemical on the list matches and can be easily cross-referenced with the product identifier on its label and on its


630 words - 3 pages The Solution to FDA Oversight Food is an essential part of everyone’s life. Therefore, there is a huge food industry that is intertwined with everyone’s life. People may not realize our relationship with food is actually quite convoluted and corrupt. This convolution and corruption are derived from food manufacturers using harmful chemicals and additives in food that could be harmful towards those who consume products containing these harmful

Related Essays

Victoria Chemicals Essay

3558 words - 15 pages Victoria Chemicals PLC (A): The Merseyside Project Capital Budgeting Case Analysis ------------------------------------------------- DeQuincy Adamson Donald Harrell Lekisha McKinley Taylor Wolfe Finance 5387 Spring 2012 Victoria Chemicals: Case Background Victoria Chemicals was a major competitor in the chemical industry worldwide. The company was the leading producer of polypropylene, a polymer that is used in a variety of

Victoria Chemicals Case Analysis

3567 words - 15 pages Victoria Chemicals Victoria Chemicals PLC (A): The Merseyside Project Capital Budgeting Case Analysis ------------------------------------------------- DeQuincy Adamson Donald Harrell Lekisha McKinley Taylor Wolfe Finance 5387 Spring 2012 Victoria Chemicals: Case Background Victoria Chemicals was a major competitor in the chemical industry worldwide. The company was the leading producer of polypropylene, a polymer that is used in

Alto Chemicals Europe (Ar) Essay

912 words - 4 pages Leading Org. Culture & Change Case 4: Alto Chemicals Europe (AR) 1. At the time of Graaff’s appointment, how good a job do you think the sales force was doing? The ACE’s headquarters organization was by product group and the subsidiaries was by function. The interaction could be best described as a matrix relationship. In that case there was a dual sources of influence on product and subsidiary management. Stabilizers had experienced an

New Worlds Chemicals Inc Essay

1689 words - 7 pages New Worlds Chemicals Inc. Section A Assume (1) that NWC was operating at full capacity in 2008 with respect to all assets, (2) that all assets must grow at the same rate as sales, (3) that accounts payable and accrued liabilities also will grow at the same rate as sales, and (4) that the 2008 profit margin and dividend payout will be maintained. Under those conditions what would the AFN equation predict the company’s financial requirements to