Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: owlpower on September 15, 2018, 01:00:33 AM
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Question : https://imgur.com/a/nGCsjOl
How do I tell which one won't rotate plane polarised light? I know that chiral molecules will rotate plane polarised light. They are all stereo isomers of each other, and I determined 1 to be RR, 2 to be SS, 3 to be RS and 4 to be SR. I also know meso compounds are chiral but do not exhibit optical activity...
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I'd look again at your assignments. Why are 2 and 4 apparently different, for instance?
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Wait a minute...2 and 4 are conformers, aren't they?
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I think so...
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Meso compounds are not chiral. Is one of your drawings a meso form?
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Convert all newman projections into Fisher Projections and from there you can easily figure out which one is meso and not chiral.