![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrDWuHxGr623a4iWP63dwmCLHbrsBeVRdnykP3fZHY5HXvgO3d2Umq7vuLstZP2Sd4ibhUUPS4P2OZRjdcFHGYny70u-c57lPNjB6Y6q9Vr4RqQ4JKMJyuWJlSkJa-ij02PEBBX9_v1bAp/s400/aa.jpg)
And given that the first two results are definitely correct, what can one say about the third?
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpSunGtaNlrJU0c7sMdVWzgnrqfJW_8TuVgRjkNZ5V9-KMaN4COk3I4Qy8KBsXbRm314b5vgIoP6uqaumFpX2VFLPp-iwScmm_Gckymy6DIPeyS6YP-P9znLXECLZXN9CKkkcf1s1j5l69/s400/asd.jpg)
And well well, here are two molecules where students usually assign the wrong point group to:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVUJVaaEj-ZUEM9mmnf4mtjqnxv7qK_fLdL7SBaesMASJSmT3zaln-u-F2wmLPpre_dAGFep4QiyqK8ZFVOG89PjS3M79g6A48YRZW6NziWnXjzsUCKCnDE0ah7SUxwH0hN5jAyh2Z4ba6/s400/allene.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgN7YGdiP-drx0C__cbjYyUFpHTW6xBlz1j3MlJKYGNpfaZV5SfE1L7rHXFCke_G6ZbGz7LAAzzpvqYWQV66SZlh6i1njWj6TUkSi8669lXv3-ZdxX1QTtLR2TOiPDpoffXa2EbwHtZMTqp/s400/difluoro.jpg)
If you'd like to try, then don't play cheat and figure it out from scratch! :)
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Because I am the lazy person that I am (I'm too tired, :p), the answers are as follows without explanation or elaboration:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4-0lsBhyvOj6u6Mu9cE1odrGmJu7tWsVZOdE8WXhFB99fTlbqzB5maVg7d_yx0bk1JAmSSSCwTM0vWG-RGLPYK89QY6YmMvK6SBZL5gdT9a62NfHIqEibwf3TbIqQUh3QB4cINElZH8Nw/s400/ddd.jpg)
3 comments:
S_5^5 cheat one. Booo.
I suppose the propadiene's point group is C_2 x C_2 and the difluoronapthalene's is C_2?
The nC2 axes for the allene are devilish!
And I thought the octahedral complexes with bidentate ligands were bad enough. This allene is supposedly the "simplest" case, hmm?
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