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Questions tagged [symmetry]

The description of the symmetry present in molecules. Molecular symmetry is useful for explaining or predicting of a molecule's chemical properties.

-2 votes
0 answers
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Are all helicenes optically active? Aren't they having a plane of symmetry? [closed]

Are all helicenes optically active? Aren't they having a plane of symmetry or centre of symmetry? Please give a detailed explanation
2 votes
1 answer
73 views

Identifying Type of Symmetry Operations

From the given set of symmetry operations for a space group, say, P-3m1 or Cmma, how can one identify the type of all symmetry operations. For example, how to distinguish the axis of rotation symmetry ...
0 votes
0 answers
45 views

Why is α-truxillic acid not meso compound? [duplicate]

I know that for a compound to be meso it should be optically inactive and should have multiple chiral centres but in case of α-truxillic acid, it is optically inactive due to centre of symmetry being ...
0 votes
0 answers
59 views

How do we determine the local symmetry of anatase TiO2?

In this physical review B paper, the authors mentioned that the local symmetry of anatase TiO2 is D2d point group. Also, in this applied physics letters paper, the authors mentioned that the symmetry ...
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0 answers
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Tips for determining molecular point groups

Does anybody have tips on how to easyily determine the point group of a molecule? I am having a hard time even with the simple molecules. For example: Determine the symmetry of the conformation of ...
1 vote
1 answer
88 views

Electronic configuration and symmetry labels of 3d$^7$ ions

In 3d$^7$ ions, e.g. Co$^{2+}$, the ground state is $^4$F, and it contains different levels due to the crystal field, such as $^4T_{1g}$, $^4T_{2g}$ and $^4A_{2g}$. Can anyone tell me what exactly ...
5 votes
1 answer
2k views

Where is the mirror plane in 1-bromo-1-chloroethene?

I'm studying point groups in inorganic chemistry and having a difficult time understanding some of these concepts. In my book, Inorganic Chemistry: Fifth Edition by Miessler, Fischer, & Tarr, I am ...
-1 votes
1 answer
48 views

Optical rotation and chirality

I had the same question as in Molecular chirality and optical rotation In the answer, it says that there can't be such a mirror position where the effect of one molecule be cancelled by other. But I'm ...
0 votes
0 answers
101 views

Jahn-Teller Distortion: How to compare magnitudes (in Cu2+ complexes)?

Octahedral complex of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper(II) complexes will who the maximum structural distortion? (en - ethylenediamine) (A) $[Cu(...
2 votes
0 answers
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How do two orbitals need the same symmetry to bond? Do they need the same mulliken label?

I heard that in order for two atomic orbitals to form a bonding molecular orbital, they need: Similar energy Similar symmetry and Possibility of overlap with the same sign but, for example in methane, ...
-2 votes
1 answer
199 views

Why can s and p orbitals of one atom form hybrid orbitals but the overlaping of s & p orbitals of two different atoms don't form a molecular orbital?

So my question is in the title : Why can s and p orbitals of one atom form hybrid orbitals but the overlapping of one s orbital and one p orbital (perpendicular to the bond axis) of two different ...
1 vote
1 answer
98 views

H-NMR Analysis of C15H24O

I was able to figure out that the structure of this compound was a benzene ring with 2 equivalent trimethyl groups to give the 18H singlet. Another non-equivalent methyl group to give the 3H singlet. ...
2 votes
1 answer
109 views

How do you determine point groups of more complex molecules when there are 2 or more central atoms?

I am trying to determine the point group of Fe2(CO)8 and am having difficulty with the bond angles and geometry. How would one go about this in a logical sense?
0 votes
0 answers
46 views

Bromate ion point group?

Would the bromate ion have C3v point group due to the trigonal pyramidal geometry? I see a C3 rotational axis and a vertical plane of symmetry. Am I missing anything in terms of the double bonds or ...
3 votes
0 answers
27 views

What prevents an octahedral complex from always assuming the quadratic planar limiting case, due to the Jahn–Teller distortion?

When a given high-spin complex is Jahn–Teller distorted, this does not change the relative position of the total energy of the complex (assuming $\mathrm{d^{10}}$ configuration). Indeed, the ...

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