OPTICAL NATURE OF PRODUCTS

1) An S_N² reaction at an asymmetric C of a compound always gives A SINGLE STEREOISOMER

2) An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon
Then the ester formed will be an OPTICALLY ACTIVE COMPOUND

3) A racemic mixture of carboxylic acid having one chiral centre is treated with

enantiomerically pure amine then the poducts formed r DIASTEREOMERS( BOTH OPTICALLY

ACTIVE)

4) FROM xyz

" CAR=Cis Anti Raecmic.means when a Cis compound attacked in anti fashion gives raecemic

mixture "

But he says he was not sure

So plzzzzz confirm

He's correct...

Similarly, TRAM- Trans compound attacked aanti gives meso product.
And vice-versa.

These rules are generally true.

CAR and TRAM are good ones

in Diels-Alder reaction the stereochemistry of the reactants do not change..i mean if the reactant is in cis format then the product will also be cis...though diels alder is not in course..but still many questions have been asked on it in FIITJEE AITS..