Question
This is the geometry with the smallest coordination number that has the point group D-sub-3h. This molecular geometry is found at the transition state of a nitrogen atom that undergoes umbrella inversion. The most common Lewis acid catalyst for Friedel–Crafts reactions has this geometry. In an SN1 reaction, the loss of a leaving group forms a carbocation ("carbo-CAT-ion") with this geometry. An empty p-orbital explains why molecules such as phosgene and (*) formaldehyde have this geometry. This geometry is found in molecules with sp2 hybridization, such as boron trifluoride, whose bonds form 120 degree angles with each other. For 10 points, name this flat molecular geometry that consists of three substituents around a central atom. ■END■
ANSWER: trigonal planar [prompt on triangular or triangle; prompt on planar]
<Science - Chemistry>
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Summary
| Tournament | Edition | Exact Match? | TUH | Conv. % | Power % | Neg % | Average Buzz |
|---|---|---|---|---|---|---|---|
| 2025 PACE NSC | 06/07/2025 | Y | 42 | 88% | 17% | 0% | 86.81 |