Welcome Guest Search | Active Topics |

Tag as favorite
Fischer Projections
Options
Previous Topic Next Topic
janesu
#1 Posted : Tuesday, August 11, 2015 3:26:16 PM
Rank: Newbie

Groups: Registered
Joined: 7/26/2015
Posts: 1

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi all,
I am having trouble with fischer projections. How do you tell which of the projection arms are going back into the page to assign chirality. Also if one of the chiral carbons is R and the other is S is the molecule optically inactive?
Back to top
Report?
radhika
#2 Posted : Wednesday, June 15, 2016 4:09:57 PM
Rank: Administration

Groups: Registered, Administrators
Joined: 10/21/2015
Posts: 3

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hello,

In a Fischer projection, horizontal lines represent bonds coming out of the plane of the paper and vertical lines represent bonds going behind the plane of the paper (these are the ones pointing at the back essentially).


If you have one molecule in which one carbon is R and the other is an S, we say that it is optically inactive. In reality, the rotation conveyed by one carbon is outdone by the other which is of the opposite configuration.
Back to top
Report?
Users browsing this topic
Guest (2)
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.066 seconds.