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Download Advanced practical organic chemistry by Leonard, John; Lygo, B.; Procter, Garry PDF

By Leonard, John; Lygo, B.; Procter, Garry

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If other products were also obtained, they can be added, again in a different color ink if desired. Thus, simply flicking through the laboratory book, looking at the schemes, can quickly provide a good deal of information. It is good practice to write a balanced equation that includes all byproducts, both from the main reaction and from the reagents used. This can be helpful in working out mechanistic details or evaluating what happened if the reaction did not proceed as expected. 5. Literature references It is good practice to write any key literature references in your laboratory book.

Wt. moles Equiv. 4 Source p. A21 Aldrich Method: The aldehyde (200 mg) and CeCl3 solution (2 ml) in MeOH (25 ml) were cooled to 0°C, then NaBH4 (27 mg) was added in batches (ca. 5 mg at a time) over 10 min. /EtOAc BB A23a (red/brown - vanilin) BB A23b (brown - vanilin) SM Rxn SM Rxn (b) After 30 min, TLC showed no starting material, so the MeOH was evaporated under reduced pressure. The residue was dissolved in CH2Cl2 (30 ml) and the solution washed with 10% aq. HCl (10 ml) followed by sat. aq.

If you are aware that a procedure might carry some risks, consider alternative ways of performing the experiment. Look for methods that involve the least hazardous reagents and techniques. Assess all the possible hazards associated with the reactions that you are planning to carry out as well as the chemicals you are using before carrying out a reaction. As well as toxicological issues, make sure that you are aware of any significant exotherms Chapter two: Safety 5 associated with the reaction and thermal instability issues associated with your chemicals.

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