Questions tagged [optical-properties]
Questions related to color as well as the reflecting and refracting properties of chemicals.
159
questions
2
votes
1
answer
840
views
How many stereoisomers can exist for 4,5-bis(3-hydroxyoct-1-en-1-yl)cyclopentane-1,3-diol?
Q.10 For the given compound $\ce{X}$, the total number of optically active stereoisomers is ____.
This is from JEE Advanced 2018 second question paper.
I thought the answer to be at least 32 because ...
CommunityBot
- 1
1
vote
1
answer
168
views
How to identify an error in cut off filter (optical) usage when running spectrophotometry?
In spectrophotometry, often a cut off optical filter is used. With reference to a long-pass filter, which rejects any wavelengths outside a predetermined interval: low transmission in short ...
- 41.5k
4
votes
1
answer
325
views
Approximate magnetic susceptibility of these liquid propellants?
This question asks if the comparatively large paramagnetic susceptibility of liquid oxygen (LOX) is considered when designing rocket tank and engine systems. This comment suggests fuels such as RP-1 (...
- 837
1
vote
1
answer
6k
views
What is the color of elemental silver?
From my lab book it says it is black? I don't understand how we know the color of it is black. Can anyone explain?
- 10.9k
7
votes
1
answer
2k
views
Home science optical absorption test for approximate caffeine quantity in coffee?
I started with How can you measure the caffeine content of a liquid at home? in the cooking stackexchange, but the test strips were only qualitative (yes/no) and don't seem to exist anymore, and the ...
- 5,898
2
votes
2
answers
2k
views
Is the refractive index of a solution of four substances the median of the four substances' refractive index?
I need to determine the purity of a solution and we need to discuss about the 'theoretical' refractive index of the substance that we are supposed to have.
- 22.5k
0
votes
0
answers
1k
views
What are the limitations of the D, L system and the (+), (-) system for naming organic compounds
In organic chemistry, both the D, L system and the (+), (-) system are widely used, in conjunction with the modern (R, S) system.
The D, L system names an organic molecule based on the direction that ...
- 38.4k
4
votes
1
answer
425
views
Does syn-dihydroxylation form racemic mixture?
I have been asked to determine the nature of the product for the following reaction:
And as I recognized this reaction to be a case of syn-dihydroxylation, my obvious response was that the product ...
3
votes
0
answers
72
views
Does optical isomerism fall under the category of stereoisomerism?
I have been asked to find the total number of dichlorination products (including stereoisomers) for the following reaction:
I have figured out nine possible structures out of which two are optically ...
- 462
8
votes
1
answer
6k
views
Why are complexes of type MA3B3 not optical active?
Complexes of type $\ce{MA3B3}$ have two geometrical isomers, namely:
fac-isomer
mer-isomer
If we look closely at the mer-isomer, it has a plane of symmetry, so it is optically inactive.
But the fac-...
- 59.6k
3
votes
2
answers
196
views
Chirality and Optical activity
Do all chiral objects rotate the plane of polarization of EM waves? For example my hand is chiral, will it rotate the plane of polarization of EM waves of suitable wavelength?
CommunityBot
- 1
16
votes
1
answer
2k
views
How are polarizabilities measured experimentally?
Most common spectroscopies that produce either a full spectrum, a tensor, or a scalar value have a specific instrument associated with them that is relatively self-contained and not custom. For ...
- 40.9k
0
votes
1
answer
2k
views
Which are the Geometrical isomers of the complex [Cr(NH3)2Cl2(en)]+?Is it one or two?
I was recently studying coordination compounds and i came across optical isomerism shown by complexes.I think that the complex i gave above have 4 geometrical isomers(I think this is where I am wrong, ...
- 17.5k
1
vote
0
answers
90
views
How to calculate the refractive index of mixtures? [duplicate]
In "How to Calculate the Refractive Index of a Formulation", the article outlines a method to find the refractive index of a mixture but the sources don't lead to any evidence regarding its ...
- 196
1
vote
0
answers
47
views
Beer-Lambert law absorption by each species
Light travels length $l$ through a medium with $n$ independently absorbing species with extinction coefficients $\alpha_1,\dots,\alpha_n$. According to Beer-Lambert law, the amount of light absorbed ...
- 22.5k