1-(a)Some properties of D-isomenthol are listed. Fill in the corresponding prope

Question

1-(a)Some properties of D-isomenthol are listed. Fill in the corresponding properties for L-isomenthol.

i believe that the corresponding numbers for L-isomenthol should be exactly the same as the D-isomenthol since they have the same physical properties! ! please correct me if i am wrong!!
(b) Using the information from the above table only, is L-isomenthol levorotory or Dextrortatory?explain.
--so i think it's D because of the rotation sign! am I right?
2- Normal amino acids,used to make protein, are in the L-configuration. what would be most likely to happen if you ate food with the amino acid D-alanin instead of L-alainine?
thank you in advance!

Explanation / Answer

a) D- Isomenthol and L-isomenthol are enantiomers which have exactly identical physical properties except optical rotation. Thus they differ only in their optical rotation whose magnitude is same with opposite sign.

b) Yes. D-menthol is dextrorotattory as the given sign for optical rotation is+, making its L- isomer laevorotatory.

2. Our body can absorb naturally occurring L- aminoacids as the enzymes in the body are very specific to the structure. They work like lock and key mechanism. D- amino acids have diferent levers which can not open the lock of enzymes. thus they are not digested in the body.

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