Question

This quantity is measured for an NCE ligand (“LIG-und”) to determine the state of spin-crossover iron complexes, since it increases by 10 percent upon excitation. The Fourier (“FOR-ee-ay”) transform of the gas-phase molecular intensity curve is a histogram plotting this quantity, which is also the first peak in a crystal’s pair distribution function. It’s not a reaction rate, but due to trans influence, this quantity increases for ligands opposite sigma acceptors in square planar complexes. Mono·clinic crystals have three different values for this quantity labeled a, (-5[1])b, and c. (10[2])Without pseudo·rotation, this quantity is greater for apical (10[1])than equatorial (10[1])ligands (-5[1])in trigonal bi·pyramidal (10[1])complexes. (10[2])Conversely, (10[1])two distinct values for this quantity (10[1])are measured on octa·hedral copper complexes (10[1]-5[1])because of a Jahn (“yahn”)–Teller distortion. (10[3]) For 10 points, a crystal’s lattice (-5[1])constant is analogous to what quantity, which is usually about an (10[4])angstrom? (10[5]0[4])■END■

ANSWER: metal-ligand bond length [or bond distance; or bond radius; or interatomic spacing; or interatomic distance; accept lattice parameter or lattice constant until “lattice” is read; prompt on length, distance, radius, or spacing; prompt on a until read; prompt on d; prompt on r]
<Chemistry>
= Average correct buzz position

Summary

2023 ACF Nationals04/22/2023Y2492%0%17%117.41

Buzzes

PlayerTeamOpponentBuzz PositionValue
Swapnil GargUC Berkeley AHarvard A83-5
Nikhil ChellamNorthwestern AToronto A8610
Kevin YeUC Berkeley BMichigan A8610
Maximillian NieburJohns Hopkins ARutgers B9410
Dan NiCornell BChicago C9610
Adam FineChicago ACornell A97-5
Eric WolfsbergStanford AWUSTL A10010
Geoffrey WuColumbia AMIT A10110
Tracy MirkinFlorida AMaryland A10110
David BassVirginia AMcGill A10210
Vivek SasseChicago BYale A10810
Maxwell YeMinnesota AIndiana A11410
Yash MandaviaIllinois AWUSTL B114-5
Vincent DuNorth Carolina ATexas A11910
Arya KarthikGeorgia Tech AOhio State A11910
Jason HongBrown ADuke A11910
Carlos DoebeliImperial AVanderbilt A126-5
Geoffrey ChenCornell AChicago A13710
Frederick Rivas-GiorgiYale BClaremont A13710
S. A. ShenoyGeorgia Tech BPenn State A13710
JD KrothIowa State ARutgers A13710
Forrest WeintraubColumbia BHouston A1380
Sean DoyleHouston AColumbia B1380
Neal JoshiWUSTL BIllinois A13810
Aidan FeinVanderbilt AImperial A13810
Jeya IyaduraiFlorida BMinnesota B1380
Matt SchiavonePurdue ANYU A13810
Isak JatoiSouth Carolina APenn A13810
Mazin OmerHarvard AUC Berkeley A13810
Benjamin WeinerMinnesota BFlorida B1380