Help with Polarized Light d, l, +, - and R & S ???

[thomasfx10]

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I am going through the EK OChem 1001 workbook and I just want to verify my logic ...

d,+,R = Clockwise Polarized light rotation?

l,-,S = Counterclockwise rotation?

The capital D and capital L does not have anything to do with the direction?

Thanks!

 

[PiBond]

I am going through the EK OChem 1001 workbook and I just want to verify my logic ...

d,+,R = Clockwise Polarized light rotation?

l,-,S = Counterclockwise rotation?

The capital D and capital L does not have anything to do with the direction?

Thanks!

R and S do not correspond to the rotation of plane polarized light. They refer to absolute configuration about a chiral center and nothing more. D and L have nothing to do with direction either; they simple tell us how a molecule compares to the reference point glyceraldehyde.

 

[thomasfx10]

Thanks Pibond!

 

[ModusProbandi]

R and S do not correspond to the rotation of plane polarized light. They refer to absolute configuration about a chiral center and nothing more. D and L have nothing to do with direction either; they simple tell us how a molecule compares to the reference point glyceraldehyde.

I thought D was to the right and L was to the left, R and S refer to the position of the constituents in reference to some rule whose name I forgot I think it was the Hackle-Berry-Murph rule (completely made that up but there are two hyphens).

 

[Rabolisk]

No, D and L do not have to do with the direction of rotation of polarized light.

R and S have to do with absolute configuration, which is determined with based on Cahn-Ingold-Prelog priority rules.

 

[ModusProbandi]

No, D and L do not have to do with the direction of rotation of polarized light.

R and S have to do with absolute configuration, which is determined with based on Cahn-Ingold-Prelog priority rules.

I mean d and l oops, i haven't got to D and L ochem yet.

 

[PiBond]

I mean d and l oops, i haven't got to D and L ochem yet.

lowercase d and l refer to plane polarized light...dextrorotary and levorotary respectively