[trinhn812]

<a href="http://s45.photobucket.com/albums/f84/azncrombie/?action=view&current=chemistry6.jpg" target="_blank"><img src="http://i45.photobucket.com/albums/f84/azncrombie/chemistry6.jpg" border="0" alt="Photobucket"></a>

I don't think A is chiral because it has that double bond that kinks it. Not sure about B or C. D and F has a stereocenter so they're chiral. E doesn't have a stereocenter, but it doesn't have symmetry nor inversion center.

What do you guys think.

[trinhn812]

direct link here:  http://s45.photobucket.com/albums/f84/azncrombie/?action=view&current=chemistry6.jpg

[jj74]

I think you're right for D & F, they're chiral (but they both have two stereocenters, not one, and they're not meso). Some of the others have simmetry element(s) that make them achiral

[Dan]

D and F has a stereocenter so they're chiral.

Careful, look up the definition of meso.

I agree with you on E.

Take each compound, draw the mirror image and try to superimpose it on the original. That's the safest way to check it.

I make it 3 chiral, 3 achiral.