stero/organic question

[theedaddy77]

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Br2 plus alkene and br2 ccl4 to alkene both produce trans to each other right? or is it just when we use the ccl4 they are trans....

van der Waals forces and van der walls equation what are these two and how do they relates if at all with pv=nrt??? thanks sdn!

 

[harrygt]

Br2 plus alkene and br2 ccl4 to alkene both produce trans to each other right? or is it just when we use the ccl4 they are trans....

van der Waals forces and van der walls equation what are these two and how do they relates if at all with pv=nrt??? thanks sdn!

FOr the first question, there is no difference. We just use CCl4 as a solvent for the reaction, which has nothing to do with the mechanism or the products.
You gotta a problem in your question though. Once you add Br2 to an alkene, then you might get enantiomers or meso compound. You are not gonna have cis or trans after addition. One thing you sould know is that Br2 adds anti to a double bond.
if you add two substituents in an anti manner to a trans compound, you will get meso.
if you add two subs in syn manner to a cis compound, again you get meso.
if you add two subs. in an anti manner to a cis compound, or in a syn manner to a trans compound, you get racemic mixtures. Try to draw the saw horse notation for each case, and rotate the bonds to see if you can find an internal plate of symmetry for the meso compounds.
I hope this helps.

 

[theedaddy77]

thanks bro! do u also now the 2nd one? Also i didnt get ur email yet 🙁 K

 

[harrygt]

thanks bro! do u also now the 2nd one? Also i didnt get ur email yet 🙁 K

For the second one, Wander wals forces are one type of intermolecular forces. PV = nRT is the ideal gas law. In the idea gas law, you assume there are no intermolecular forces.
I just sent you an email again. See if you get it. Check spam email if you don't see it in inbox.