Question

Grignard Lab1. (3 pts.) Why is it important to dry your glassware before starting this week’s synthesis?2.

(3 pts.) What would happen if you tried to make a Grignard reagent using ethanol as the solvent?3. (3 pts.) If the benzophenone you used was wet, then you would not have formed the Grignard adduct, orat least you would have formed less of it, and a side-product would have formed. What would this sideproducthave been?4. (3 pts.) Ethers are almost always used as solvents for Grignard reactions, all of the reasons why theywork so well are not fully understood. Some help comes from characterizing the ether solvents. Statewhether they would normally be characterized as polar or nonpolar and also whether they would normallybe characterized as protic or aprotic.5. (2 pts.) Although we don’t understand everything about why ethers are good solvents for Grignardreactions, we could guess why hexane would not be a good solvent by thinking about its properties. Statewhether hexane would normally be characterized as polar or nonpolar and protic or aprotic and give onepossible explanation why hexane would not be a good solvent for a Grignard reaction, taking into accountthat the C-Mg bond in a Grignard reagent is highly polar, it is almost ionic.6. (4 pts.) One problem with organic chemistry is that we tend to focus on one molecule at a time, we forgetthat there are many, many molecules undergoing the reaction. Assume you started with exactly 1 g ofbromobenzene, how many MOLECULES OF bromobenzene is this? (Avogadro’s number = 6.022 x1023). Give the number of molecules to 3 significant figures and do NOT USE SCIENTIFIC NOTATION,i.e. include all of the zeros in your number. After the number write down the number of zeros you includedin parentheses. For example, if your answer is 5.99 x 1021, then you would write it as follows:5990000000000000000000 (19 zeros). SHOW YOUR WORK and INCLUDE ALL UNITS! ATTACHMENT PREVIEW

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