Which statements about stereoisomers are true? (Sec. 6.7, 6.8)
I. enantiomers and diastereomers have the same physical properties.
II. 50/50 mixtures of R and S enantiomers are called racemic mixtures.
III. meso isomers rotate the plane of plane polarized light.
IV. dextrorotatory compounds rotate plane polarized light to the right.

Question

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Statement II is true, stating that racemic mixtures are made up of a 50/50 mix of R and S enantiomers. Statement IV is also true, stating that dextrorotatory compounds (compounds that rotate plane polarized light to the right) are a type of stereoisomer. Statement I is false, as enantiomers and diastereomers have different physical properties (such as boiling point and specific rotation). Statement III is also false, as meso isomers do not rotate plane polarized light, despite being a type of stereoisomer.

Which Statements About Stereoisomers Are True? (Sec