I cannot figure out these homework questions if anyone can help that would be amazing! I just do not even know how to go about them.enter image description here

  • $\begingroup$ The first two recquire that you may identify the difference between the product, and the corresponding starting material. Think about functional groups, how these may react to yield the new pattern? In #3 one hint is given by the reagent; perhaps you forgot how it acts -- if so, there is nothing wrong to look up a twice you notes, or your text book. Or, where exactly do you struggle? $\endgroup$ – Buttonwood Dec 2 at 21:30
  • $\begingroup$ Thank you for answering! I am just having trouble finding out how the double bonded O turns into two single bonded O's. The closest mechanism I could find for this was O3 and Me2S... Still lost $\endgroup$ – Melina M Dec 2 at 21:38
  • $\begingroup$ Ok, you don't see yet how the tetroxyde leaves the substrate by action of water as nucleophile. Since the entry on wikipedia (en.wikipedia.org/wiki/Osmium_tetroxide) is not this detailed about the «liberation» of the alcohols, see this British exercise here (orgmech.co.uk/mech.php?&Num=482). Good luck! $\endgroup$ – Buttonwood Dec 2 at 21:56
  • $\begingroup$ And at some time, have a look at chemistry.stackexchange.com/questions/37303/…, which may be helpful in future, too. $\endgroup$ – Buttonwood Dec 2 at 22:02
  • $\begingroup$ As a noobie to ChemSE you should realize that you need to make some effort toward a solution. These steps are from the synthesis of longifolene by E. J. Corey. [chem.wisc.edu/areas/reich/syntheses/longifolene-corey.htm] the ring expansion involves a cyclopropyl carbinyl cation. The rest is up to you. $\endgroup$ – user55119 Dec 3 at 0:03