This is really helpful to see these figures demonstrating the symmetry elements. Cotton's Chemical Applications of Group Theory has a similar checklist btw which is the textbook I'm working in now. And he uses the sigma d notation for C groups as well. The difference between v and d planes confused me for a day or two but Cotton dies explain that they are completely arbitrary
Because, fundamentally, this isn't Chemistry. The labels "C", "D", etc. refer to different kinds of "Groups". They are mathematical structures that obey similar laws. This is just the application of a branch of Math called Group Theory to atoms and molecules. Group Theory can be used to describe the symmetry of any object, not just molecules. But, ultimately, what you need to know for Chemistry is the different symmetry operations. Flipping across a mirror plane, rotating a molecule, or doing a combination of both. Also, importantly, according to Group Theory there exists an "identity" operation, usually denoted by "e", which doesn't change the molecules orientation at all. Doing different combinations of symmetry operations will be equivalent to doing some other symmetry operation in the Group. For example, flipping an atom across a mirror plane through the middle of the molecule is the same as rotating 180°. Rotating 360° is the same as the identity operation "e", and so on.
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Litterally the best point group identifying video I've ever seen
Thank you so much for this. I have my first inorganic exam tomorrow and this helped me so much!
This is really helpful to see these figures demonstrating the symmetry elements. Cotton's Chemical Applications of Group Theory has a similar checklist btw which is the textbook I'm working in now. And he uses the sigma d notation for C groups as well. The difference between v and d planes confused me for a day or two but Cotton dies explain that they are completely arbitrary
it took me an hour to fully understand it T.T thank you so much,
My daughter has a few molecules like the ones your holding, She's getting an early start learning chemistry.
thank you
Cool pen!
Great tutorial thank you!!!
You’re welcome!
This was an amazing video, tysm!
You’re welcome!
No one can explain this well
Because, fundamentally, this isn't Chemistry. The labels "C", "D", etc. refer to different kinds of "Groups". They are mathematical structures that obey similar laws. This is just the application of a branch of Math called Group Theory to atoms and molecules. Group Theory can be used to describe the symmetry of any object, not just molecules. But, ultimately, what you need to know for Chemistry is the different symmetry operations. Flipping across a mirror plane, rotating a molecule, or doing a combination of both. Also, importantly, according to Group Theory there exists an "identity" operation, usually denoted by "e", which doesn't change the molecules orientation at all. Doing different combinations of symmetry operations will be equivalent to doing some other symmetry operation in the Group. For example, flipping an atom across a mirror plane through the middle of the molecule is the same as rotating 180°. Rotating 360° is the same as the identity operation "e", and so on.
I'm trying to hard to visualize the planes but I'm failing
thank you
You’re welcome!