The ring expansion (above) proceeds from an initial enolate 1 which undergoes an intramolecular aldol reaction to give intermediate 2. then undergoes a retro-aldol reaction to give enolate 3. A final protonation gives the product. Write a detailed mechanism for this reaction on paper, then draw structural formulas for intermediate 2 and enolate 3 in the window below.

passing a magnet thought the

mixture , because iron gets attracted to magnet .

i dont know

explanation:

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.