products of Diels Alder reactions

[doubledoctordoubletrouble]

What is a good way to tell the number of products that can be formed from a Diels Alder reaction?
Please take a look at the attachment below---
Apparently only 1 product is formed, but I put down that 2 would form: the one pictured in the attachment, and one with the carbon pointing downwards and the dienophile group pointing upwards...

---

Members don't see this ad.

 

[medic86]

It's only one because your dienophile can only react in one way (it's symmetrical).

 

[doubledoctordoubletrouble]

It's only one because your dienophile can only react in one way (it's symmetrical).

Hm... but here in this example here with the same dienophile, it shows two different products...
http://en.wikipedia.org/wiki/Diels–Alder_reaction#mediaviewer/File:Retention.png

 

[Yorick]

Hm... but here in this example here with the same dienophile, it shows two different products...
http://en.wikipedia.org/wiki/Diels–Alder_reaction#mediaviewer/File:Retention.png

Well yes that's if you include stereoisomerism. What was the choice you selected? You can get the endo product, the one above, or the exo product in which the dienophile is pointing upwards but the exo product is much less stable and not generally observed.

 

[doubledoctordoubletrouble]

I put that there were two possible products (and according to your response, there are), but the answer key states that only one is possible...

 

[doubledoctordoubletrouble]

Well yes that's if you include stereoisomerism. What was the choice you selected? You can get the endo product, the one above, or the exo product in which the dienophile is pointing upwards but the exo product is much less stable and not generally observed.

I put that there were two possible products (and according to your response, there are), but the answer key states that only one is possible...

 

[Cawolf]

Could you post the whole question?

 

[htdt]

Is the Diels-Alder rxn even on the test?