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Topic: Stereocenters for decalin  (Read 2247 times)

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Offline vverityv

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Stereocenters for decalin
« on: August 30, 2012, 01:04:08 AM »
I had an online homework problem to "use wedged bonds, draw the stereoisomer of decalin that is lowest in energy using information about the conformational energetics of substituated cyclohexanes..."

Basically, I drew decalin in a trans-chair conformation (the chairs are side by side sharing a bond with one H going up axial on one and one H going down on the opposite) and then I have wedges and dashes for all of the other hydrogens on the other carbons....

But when I submit the answer, the program tells me that it's wrong and to "please show the configuration at both stereocenters..." but didn't I already do that?? Am I suppose to draw the flat rings and put the wedges on those instead?

does anyone know what this means?? I know my answer isn't necessarily wrong, but I'm not really sure what it's telling me to do...

Offline discodermolide

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Re: Stereocenters for decalin
« Reply #1 on: August 30, 2012, 01:05:47 AM »
I had an online homework problem to "use wedged bonds, draw the stereoisomer of decalin that is lowest in energy using information about the conformational energetics of substituated cyclohexanes..."

Basically, I drew decalin in a trans-chair conformation (the chairs are side by side sharing a bond with one H going up axial on one and one H going down on the opposite) and then I have wedges and dashes for all of the other hydrogens on the other carbons....

But when I submit the answer, the program tells me that it's wrong and to "please draw both stereocenters..." or "please include both stereocenters..."

does anyone know what this means?? I know my answer isn't necessarily wrong, but I'm not really sure what it's telling me to do...

Draw the other comforter as well
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Offline Dan

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Re: Stereocenters for decalin
« Reply #2 on: August 30, 2012, 02:56:40 AM »
Am I suppose to draw the flat rings and put the wedges on those instead?

Probably. This is the problem with online homework.
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