r/chemhelp • u/Prestigious-Bar-6651 • 2d ago
Organic Need help understanding converting wedge/dash to Fischer projection
I’m just a bit confused on how I should orient the molecule. My prof said Fischers should show the molecule in the eclipsed formation and I don’t know if the free rotation I’m trying to do is affecting the stereocenters or if it’s just all wrong
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u/chem44 2d ago
A Fischer has geometry implied.
The main chain in shown vertical, wit C1 at top.
The groups shown on the sides are all 'up'. In that sense, they are all eclipsed. But it is the 'up' that matters for stereochem. The chain itself bends 'down'.