carbon with double bond chiral?
Started by OnlyDrilling
in the Destroyer, they said a carbon with 2 double bonds is chiral if both groups are different, for example CH3-CH2=C=CH3 ... i forgot what these were called. allenes? or something like that. it was because the two double bonds are perpendicular to each other, not parallel, so it has a nonsuperimposble mirror image, which is the definition of chiral
this is correct
oh sorry i made a mistake in my example. the two groups bonded to the two carbons directly double bonded to the "chiral" carbon have to be different, eg CH3-CBr=C=CHCl
in here, the =C= is the chiral carbon. note the two carbons directly bonded to it (both bracketed in next sentence). it's -CH3-[C]Br- with a CH3 and Br group, both have to be different; and -[C]HCl- with a H and Cl group. Both of these have to be different, and different from the other two as well. These 4 groups (CH3, Br, H, Cl) represent the 4 different groups on a typical chiral carbon that we all know.
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in here, the =C= is the chiral carbon. note the two carbons directly bonded to it (both bracketed in next sentence). it's -CH3-[C]Br- with a CH3 and Br group, both have to be different; and -[C]HCl- with a H and Cl group. Both of these have to be different, and different from the other two as well. These 4 groups (CH3, Br, H, Cl) represent the 4 different groups on a typical chiral carbon that we all know.
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hey thank all you guys so much! i got it...thankssss😀
The reason double bonds aren't chiral is because they are not tetrahedral and therefore have planes of symmetry (with the exception of alkenes which sometimes don't).
NextStep says the left most carbon (double bonded to the Oxygen) IS NOT CHIRAL because it's NOT TETRAHEDRAL. But I thought double/triple bonded carbons with the exception of one, couldn't be chiral.
