Thread: shikimic-acid bonds

Hi
Can anyone explain to me on the molecular structure of the shikimic-acid what kind of a bonds is between the 2 bottom left O and C atoms (looks like this = on top of each other)and the other one on the right(the one which is fully black looks like an arrow)
thank you

http://0.tqn.com/d/chemistry/1/0/T/P...kimic-acid.jpg
(Link for the image)

Thank you soooooo much.

As far as I can tell, those are not special types of bonds so much, but are ways to visually represent the 3-dimensional structure of the molecule. The black wedge is an "up stereo bond" and indicates that 3-dimensionally, that hydroxyl group will stick up out of the plane of the screen and toward the viewer, while the other two hydroxyl group with the other type of stereo bond ("down stereo bond") will stick out of the plane of the screen but away from the viewer. I know that in molecule-drawing software (ChemSketch, for example) one can make these bonds a wedge pointing out, a wedge pointing in, or just a straight bond, and unfortunately I don't know the different meanings between those. If you can find them, let me know.

thank you for your reply.