[halo117]

I really need help on 3 reactions, can someone please help me get started on this. I would really appreciate the help

I attached the 3 questions to the links below they are set on public so anyone should be able to see them. If you can even help me on just 1 i would greatly appreciate it!

http://www.facebook.com/photo.php?pid=30879408&l=692ceadb10&id=1250990905

http://www.facebook.com/photo.php?pid=30879415&l=f4f81d13cc&id=1250990905


Thanks!

[helenn]

For the first problem think about Grignard reactions.

[Jorriss]

Familiar with radical mechanisms?

I don't believe you can do the third with only those four reactions.

[vhpk]

All of these reactions are examples for organometallic compounds.
1/ For the first one, you need to know the reaction between Grignard reagents and carbonyl compound. The last reagent is only for oxidation.
2/ For the second one, do you know the product when RMgX reacts with H-Y?
3/ For the last one, realizing that the product has two times more carbon than the original reagent, remember the reaction of RMgX + R'X --> R-R'.
Let's try it ^^

[orgopete]

I generally agree with the hints of vhpk, however I think the last example could be done with different reactions. Since Grignard reagents are prepared by refluxing RX + Mg to give a Grignard reagent, if the coupling were a good reaction, then one should expect the dimer from Grignard formation. That is not the case. However, similar reactions to those already suggested could give the final product.