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I got all the rules of writing RS nomenclature for Perspective formula of chirality center only problem being, I m confused that given compound can have any configuration depending on how I write the perspective formula. enter image description hereenter image description here It's basically Same Molecule

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  • $\begingroup$ You need to get a physical model ... match sticks and blue-tac with paper labels / straws and blue-tac with paper labels build it and see if you can see it ... all your angles are supposed to be 109 ° are they in the second diagram? (You'll see when you build it). $\endgroup$ – user1945827 Jun 29 at 15:29
  • $\begingroup$ Not necessarily the same molecule. $\endgroup$ – Mathew Mahindaratne Jun 29 at 15:41
  • $\begingroup$ the problem is that u are focussing on the theoritical aspect of it.u r just using wedge-dash concept.try converting it into fischer form(in the correct way), and u will see that there is only 1 way doing so, and hence the same molecule. $\endgroup$ – granthium Jun 29 at 16:04
  • $\begingroup$ Keep bonds of the same type together. In structure 1, the Br and its bold bond should be flipped to the right just above the dotted hydrogen, similar to structure 2. $\endgroup$ – user55119 Jun 29 at 22:03
  • $\begingroup$ @user55119 is that a rule? $\endgroup$ – Bornloser Jun 30 at 6:05
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You're right, the two compounds you depicted are basically the same molecule except for in their chirality. They are, essentially, enantiomers of each other.

In the slightly clearer depiction below, enter image description here

by the Cahn-Ingold-Prelog convention we would call the molecule on the left S-bromochlorofluoromethane, while the one on the right would be its R-enantiomer, i.e. R-bromochlorofluoromethane.

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  • $\begingroup$ i get this , this wasn't exactly the question. question is that i can change the configuration of same molecule by adjusting how i draw the solid wedge $\endgroup$ – Bornloser Jun 30 at 5:56
  • $\begingroup$ @ManRow what software do u use to create such structures? $\endgroup$ – granthium Jun 30 at 6:56
  • $\begingroup$ @ManRow didn't create it . He just used Wikipedia. $\endgroup$ – Mathew Mahindaratne Jun 30 at 7:23

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