Question
A bracketed alpha denotes a form of rotation named for this adjective that is equal and opposite for L and D-isomers. For 10 points each:
[10h] Give this adjective that describes reactions where the stereochemistry of the reactants entirely determines the stereochemistry of the products.
ANSWER: specific [accept stereospecific; accept specific rotation]
[10m] Stereospecific reactions can either produce dia•stereomers or these isomers. Specific rotation can be used to measure ratios of these isomers, which are respectively denoted "R" and "S."
ANSWER: enantiomers [accept enantiomeric excess]
[10e] Stereospecific reactions may also form achiral meso isomers, which have at least this many chiral centers. Ethanol and ethane both have this number of carbon atoms.
ANSWER: two
<Science - Chemistry>
Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2025 PACE NSC | 06/07/2025 | Y | 30 | 11.33 | 60% | 53% | 0% |