Round 9: Tossup 6
Elaidic (“EL-ay-id-ick”) acid undergoes this reaction to form stearic acid. A catalyst commonly used for this reaction consists of three triphenylphosphine (“tri-FEN-ill-FOSS-fene”) groups bonded to a rhodium atom and is named for Wilkinson. This reaction is performed in a “syn-” (“sin”) fashion on a palladium or platinum catalyst. Due to isomerization, this reaction may introduce trans byproducts while making products less prone to auto-oxidation and more solid at room temperature. This type of addition reaction is used to produce margarine by reducing alkenes to saturated alkanes. For 10 points, name this reaction in which a molecule gains two atoms of the lightest element. ■END■
ANSWER: hydrogenation [accept hydrogenization; accept word forms like hydrogenate; accept fat hydrogenation or hydrogenated oils or hydrogenated fats; accept partial hydrogenation; accept hydrogen addition; prompt on addition until read; prompt on reduction or redox reactions or word forms like reducing until “reducing” is read; reject “dehydrogenation”] (The third line refers to trans fats.)
<Editors, Chemistry> | Packet J
= Average correct buzz position
Buzzes
| Player | Team | Opponent | Position | Value |
|---|---|---|---|---|
| Nick Machin | UCLA A | USC B | 33 | 10 |
| Jackson Crickard | Claremont B | UCLA B | 41 | 10 |
| Advai Srinivasan | UC Irvine | Claremont C | 43 | -5 |
| Aarav Kakad | UCLA C | UC Santa Barbara | 44 | 10 |
| Annika Larson | Claremont A | UCLA D | 44 | 10 |
| Kevin Hendargo | UCSD A | UCSD B | 59 | -5 |
| Chris Chang | USC A | UCLA E | 82 | 10 |
| Sarah Silverman | Claremont C | UC Irvine | 100 | 10 |
| Ethan Ririe | UCSD B | UCSD A | 100 | 0 |
Summary
| Tournament | Edition | TUH | Conv. % | Neg % | Average Buzz |
|---|---|---|---|---|---|
| UK (North) | UK | 5 | 100% | 0% | 79.00 |
| UK (South) | UK | 7 | 100% | 29% | 94.14 |
| Northern California | US | 4 | 100% | 0% | 59.75 |
| Southern California | US | 7 | 86% | 29% | 57.33 |
| Eastern Canada (1) | US | 5 | 100% | 20% | 82.00 |
| Eastern Canada (2) | US | 9 | 67% | 33% | 57.17 |
| Florida | US | 4 | 75% | 25% | 93.67 |
| Great Lakes | US | 12 | 92% | 8% | 73.36 |
| Lower Mid-Atlantic | US | 9 | 89% | 33% | 78.50 |
| Upper Mid-Atlantic | US | 10 | 100% | 0% | 76.90 |
| Upper Mid-Atlantic | US | 2 | 50% | 50% | 41.00 |
| Midwest | US | 9 | 89% | 33% | 89.75 |
| North | US | 4 | 75% | 50% | 92.67 |
| Northeast | US | 11 | 91% | 18% | 81.90 |
| Pacific | US | 8 | 88% | 38% | 82.00 |
| South Central | US | 6 | 83% | 33% | 98.20 |
| Southeast | US | 13 | 85% | 31% | 93.09 |
| Upstate NY | US | 6 | 83% | 50% | 100.00 |