CHEM 20 Study Guide - Midterm Guide: Mass Spectrum, Orbiting Solar Observatory, Sodium Hydroxide

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turquoisegnu128

9 Jan 2019

School

Harvard University

Department

Chemistry and Chemical Biology

Course

CHEM 20

Professor

All

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Document Summary

You should give yourself 70 minutes for this exam. Important notes: this exam consists of 8 problems on 8 pages, plus this cover sheet, and one page for scratch work at the end of the exam, all answers must be written in the spaces provided. Answers written on the back of a page will not be graded. Anything written on the scratch page will not be graded: you are allowed to use a set of molecular models for this exam. Name: each of the following transformations can be carried out in one to three steps. Fill in the reagents required for each step. If a step is not needed, please put an x through that box. a) b) c) d) Chemistry s-20: fill in each box with the single major organic product of the indicated transformation. Be sure to indicate stereochemistry if it is relevant! If more than one product is possible, please provide only the single most likely product.

Related Questions

This is a practice test and I really need help figuring out what reactants produce this products. I am not sure if I am correct on the first one but I tried to draw a secondary alcohol producing a ketone via oxidation. Any help would be greatly appreciated.

I need to fill out the table and show the reaction mechanism with all details please. Thank you

In a true science research lab, laboratory procedures do not present themselves in the "cookbook chemistry" fashion that most students have grown to expect. Chances are the chemist will use his/her previous knowledge and experience to develop their own procedure from scratch. If this procedure fails, the hardened chemist will not throw in the towel, but rather will make small adjustments and tweak the procedure until success is achieved. However, the smart chemist will always consult the chemistry literature to see if the procedure, or a similar procedure, has been previously performed and published. Chemists often follow procedures from primary literature sources such as Journal of the American Chemical Society or Journal of Organic Chemistry. These procedures are written with the understanding that the reader has a basic knowledge of laboratory techniques. Many of the specific details, such as the size and type of glassware utilized, along with common-knowledge, step-by-step procedures are omitted. In this experiment you are given a procedure to a Diels-Alder reaction as it may appear in a journal, and you need to be able to apply your chemistry laboratory experience to determine what glassware/equipment you will use. You will work individually on this experiment. Formation of the Diels-Alder Adduct To a solution of 0.3 g anthracene in 3 mL xylene was added an equimolar portion of maleic anhydride. This reaction mixture was refluxed for 30 minutes. The reaction was allowed to cool to room temperature and then chilled in an ice bath for 10 minutes. The observed crystals were collected, washed with cold xylene and dried. The mass, percentage yield, MP, and IR of these crystals was determined. Clearly draw the structure of your product in the space provided and then give the data for each pertinent peak in your IR spectrum. Attach your IR spectrum immediately after this page. Draw a complete reaction mechanism showing the formation of your major product from the starting materials. Make sure to show the flow of electrons by using curved arrows, as well as all charges and lone pairs where appropriate. Show all steps. Do not take shortcuts.

CHEM 20 Study Guide - Midterm Guide: Mass Spectrum, Orbiting Solar Observatory, Sodium Hydroxide

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