[sahar58]

is equal mixture of cis-1,2-dimethyl cyclopropane and trans-1,2-dimethyl cyclopropane optically active?


i know that cis-1,2-dimethyl cyclopropane is achiral and is not optically active but what will happen if have equal mixture with trans-1,2-dimethyl cyclopropane?

and what about equal mixture of S,S-trans-1,2-dimethyl cyclopropane and R,R-trans-1,2-dimethyl cyclopropane?

they are enantiomer, so can rotate polrized plane but in opposite direction. is my statement correct?

[AWK]

Hint: racemate

[sahar58]

Hint: racemate

az i know racemate, is one that has equal amounts of left- and right-handed enantiomers of a chiral molecule.

but this 2 conformation are not enantiomers and cis isomer is not chiral, too.

i guess that this mixture has optical activity, because of chiral trans.
?

[AWK]

Mixture of trans isomers forms a racemate (default). Otherwise you should specify isomer RR or SS.