Linked Questions

10
votes
1answer
807 views

How is plane polarized light rotated by chiral compounds? [duplicate]

There are plenty of questions related to this topic on this site but no proper answer. Can anyone please explain to me how plane polarized light is rotated by chiral compounds, and why it cannot be ...
1
vote
0answers
44 views

How does optical activity work? [duplicate]

I have learnt that chiral molecules are able to show optical activity; that is, they are able to rotate plane polarized light by some angle. But how does it actually happen? Won't the orientation of ...
0
votes
0answers
32 views

Why can't an "upside down" chiral molecule neutralize the polarized light effect? [duplicate]

Steve Mould did a nice video a few months back called "Why Sugar Always Twists Light To The Right" (link is timestamped at the critical part). However his explanation was not complete. He ...
0
votes
0answers
27 views

How can randomly oriented molecules in a liquid solution create a certain polarization pattern (d or l)? [duplicate]

How can a large number of moving, randomly-oriented chiral molecules in a watery solution twist light only to the left or only to the right? Wouldn't a levorotary molecule become dextrorotary if I ...
8
votes
2answers
11k views

Why do only chiral molecules rotate the plane of polarized light and how do they rotate it?

I have learnt that only chiral or unsymmetrical molecules can rotate the plane of linearly polarized light. But, why is it so? And how can molecules rotate the plane or what does it actually mean by ...
3
votes
1answer
10k views

How to determine optical activity of a compound without asymmetric carbons theoretically? [closed]

I know that a compound doesn't need to have a chiral carbon to be optically active. So how can I find out whether a compound drawn on paper is chiral without access to any experiments? e.g. 1,2,2-...
20
votes
1answer
760 views

What is occuring on the quantum level when a molecule rotates plane polarized light?

What is occuring on the quantum level when a molecule rotates plane polarized light? Also, why do enantiomers then rotate light in opposite directions? I would think that the electromagnetic waves ...
7
votes
1answer
522 views

Can molten sugar also rotate polarized light as sugar water does?

It is well know that the sugar water can rotate the plane of linearly polarized light, so light bends when travelling in sugar water. However, do the liquid state of sugar but not the sugar solution ...
22
votes
1answer
353 views

Mechanistic Explanation of Circular Dichroism

I'm wondering if someone can give me a physically motivated reason for why chiral molecules interact with left and right circularly polarized light (LCP) (RCP) differently. Particularly, a quantum ...
0
votes
2answers
361 views

Optical Isomerism

I have been told that structurally symmetric molecules are optically inactive irrespective of the atoms that are being used. However I see optical activity as the force that turns plain polarised ...
0
votes
0answers
30 views

Reason for Optical Isomerism (at electronic level) [duplicate]

I have been studying Optical Isomerism recently, and I have got one question, answer to which was not in the books that I have. I have understood what the phenomenon is, and that, how one can ...