Question

Two answers required. A narrow peak at an FT-IR vibration mode between these two elements indicates that metal soaps have crystallized on an oil painting. Two symmetric normal modes in a bond between these two elements combine and split in the most-studied Fermi resonance. A bond between these two elements bends at 15 microns at the low-energy endpoint of the infrared window. Nearby Lewis basic ligands or metals donate to the antibonding orbital between these two elements, reducing their bond frequency, in the textbook example of pi backbonding. (10[1])Bonds between these two elements (10[1])that stretch at 1700 inverse-centimeters (10[2])are (10[1])usually (10[2])the (10[1])strongest peaks in an infrared (10[2])spectrum. (10[1])A double bond between these two elements re-absorbs a large fraction of the infrared (10[1]-5[1])radiation reflected by the Earth in the greenhouse (10[2])effect. (10[4])For 10 points, name these two elements that are double-bonded in a (-5[1])ketone. ■END■ (10[1]0[1])

ANSWER: carbon AND oxygen [accept answers in either order; accept C in place of “carbon”; accept O in place of “oxygen”]
<Chemistry>
= Average correct buzz position

Summary

2023 ACF Nationals04/22/2023Y2095%0%10%111.58

Buzzes

PlayerTeamOpponentBuzz PositionValue
Jason HongBrown AMinnesota B8710
Shahar SchwartzUC Berkeley ANorth Carolina A9210
Eric WolfsbergStanford AClaremont A9710
Matt SchiavonePurdue AToronto A9710
Andrew HannaVanderbilt AMaryland A9810
Dan NiCornell BGeorgia Tech B9910
Tiffany ZhouFlorida BGeorgia Tech A9910
Nikhil ChellamNorthwestern ANYU A10010
Isak JatoiSouth Carolina AColumbia B10510
Jacob Van OorschotMcGill ATexas A10510
Mazin OmerHarvard APenn A10610
Joseph ChambersVirginia AChicago B120-5
Jonathan LauJohns Hopkins AImperial A12010
Daniel MaYale AUC Berkeley B12810
JD KrothIowa State ACornell A12810
Steven LiuMIT AIllinois A12910
Graham CopeFlorida AIndiana A12910
Ameya PhadnisRutgers BColumbia A12910
Ted GanPenn State AChicago C12910
Adam FineChicago AHouston A141-5
John BroussardHouston AChicago A1430
Vivek SasseChicago BVirginia A14310