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question about optical isomers? thanks

2008 36 tsr.PNG

asnwer is B

but why? I thought optical isomers only exist when there is a chiral carbon (ie. bonded to 4 differnet groups)

thank you :biggrin:
Original post by ah4p
2008 36 tsr.PNG

asnwer is B

but why? I thought optical isomers only exist when there is a chiral carbon (ie. bonded to 4 differnet groups)

thank you :biggrin:


It has a plane of symmetry (its called a meso compound) thus its superimposable on its mirror image so it is non-chiral and doesn't rotate plane polarised light :smile:
Reply 2
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NDVA
8
Original post by ah4p
2008 36 tsr.PNG

asnwer is B

but why? I thought optical isomers only exist when there is a chiral carbon (ie. bonded to 4 differnet groups)

thank you :biggrin:


Other molecules have at least one chiral carbon atom, while B does not have any chiral carbon atom :smile:
Reply 3
Avatar for ah4p
ah4p
OP
16
Original post by NDVA
Other molecules have at least one chiral carbon atom, while B does not have any chiral carbon atom :smile:


Original post by langlitz
It has a plane of symmetry (its called a meso compound) thus its superimposable on its mirror image so it is non-chiral and doesn't rotate plane polarised light :smile:


ah ok think I've got it now :biggrin:

thnx vvv much

could someone plz summarise the effect of optical isomers on plane polarised light? i've never rlly understood it

thnx again :smile:
Reply 4
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NDVA
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Original post by ah4p
ah ok think I've got it now :biggrin:

thnx vvv much

could someone plz summarise the effect of optical isomers on plane polarised light? i've never rlly understood it

thnx again :smile:


http://www.chemguide.co.uk/basicorg/isomerism/polarised.html

You may want to visit this site :smile:
Reply 5
Avatar for ah4p
ah4p
OP
16
Original post by NDVA

thnx very much I will :smile:

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