Question
The Pauson-Khand (“PAW-son KOND”) reaction features a synthetically impressive ability to form three new carbon–carbon bonds from an alkene, a carbonyl source, and this functional group. For 10 points each:
[10h] Name this functional group that has decent backbonding ability, allowing it to form double metallo·cyclo·propane complexes.
ANSWER: alkyne [reject “alkane” or “alkene”]
[10m] In Pauson-Khand reactions, this compound serves as a carbonyl source. This excellent backbond acceptor is a strong dative ligand for metal centers.
ANSWER: carbon monoxide [accept CO]
[10e] The oxidant N·M·O may be added in the Pauson-Khand reaction to improve this metal’s ability to act as a catalyst. This non-copper metal can be found within vitamin B12 complexes and names a blue pigment.
ANSWER: cobalt [accept Co; accept cobalt blue]
<JZ, Chemistry>
Summary
| 2023 ARCADIA at UC Berkeley | Premiere | Y | 2 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at Carleton University | Premiere | Y | 3 | 13.33 | 100% | 0% | 33% |
| 2023 ARCADIA at Claremont Colleges | Premiere | Y | 1 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at Duke | Emory, Duke, Yale | Y | 4 | 12.50 | 100% | 0% | 25% |
| 2023 ARCADIA at Emory | Emory, Duke, Yale | Y | 4 | 12.50 | 100% | 25% | 0% |
| 2023 ARCADIA at Imperial | Imperial | Y | 5 | 16.00 | 100% | 40% | 20% |
| 2023 ARCADIA at Indiana | Premiere | Y | 5 | 12.00 | 80% | 40% | 0% |
| 2023 ARCADIA at Maryland | Maryland, Online | Y | 3 | 3.33 | 33% | 0% | 0% |
| 2023 ARCADIA at Ohio State | Ohio State, Texas | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA Online | Maryland, Online | Y | 3 | 13.33 | 100% | 0% | 33% |
| 2023 ARCADIA at RIT | Premiere | Y | 2 | 5.00 | 50% | 0% | 0% |
| 2023 ARCADIA at Texas | Ohio State, Texas | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at WUSTL | Premiere | Y | 3 | 13.33 | 100% | 33% | 0% |
Data
| Imperial A | Birmingham | 0 | 10 | 10 | 20 |
| Imperial B | Oxford | 10 | 0 | 10 | 20 |
| Warwick | Cambridge B | 0 | 0 | 10 | 10 |
| Bristol | Edinburgh | 0 | 0 | 10 | 10 |
| Cambridge A | Durham | 0 | 10 | 10 | 20 |