Chiral center example set 2 organic chemistry
Beantwortet
Hi - In the examples of chiral centers in example set 2 for organic chemistry, 1, 3 difluorocyclopentane is noted as having 2 chiral carbon centers; however, I don't understand! One carbon indicated as chiral is attached to two CH2 molecules so I don't see that it is attached to 4 different groups to qualify for chiral status. The same goes for the other chrial center noted in the video. The video indicates the groups as being those that are directly bonded to the "chiral" carbon and the next group attached to that CH2, not directly bonded to the carbon(s) indicated as chiral- How will I know when to consider the not directly bonded groups as a part of the group that is to determine chirality?
Here's the structure of 1,3-difluorocyclopentane, with one of its chiral carbons notes as the black C. When looking at whether an atom has the four different groups that make it chiral, you need to look at the entire chain that it is bonded to, not just the immediate CH2 group right beside it. For example, the 4 different groups for the black chiral C are shown above. One is the fluorine, another is the hydrogen in blue, and the last two groups include the green carbon chain and the pink chain with the other fluorine in it. Because the green and pink chains are not identical, the black C is chiral.
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