Question
Crystal field theory describes the interaction between d orbitals and these species. For 10 points each:
[10e] Name these species that bind to transition metals in coordination complexes.
ANSWER: ligands
[10h] The binding of a ligand to an ion causes a decrease in this value in the nephelauxetic (“NEFF-ull-ox-ET-ic”) effect. This value, which approximates the strength of a metal–ligand bond, is the denominator of both axes of Tanabe–Sugano diagrams.
ANSWER: Racah B parameter [prompt on Racah parameter]
[10m] This ion induces the greatest nephelauxetic effect when used as a ligand. This weakest ligand on the spectrochemical series mimics the crystal structure of ice when bound to silver, making it useful for cloud seeding.
ANSWER: iodide [or I− (“I-minus”); accept silver iodide; prompt on iodine]
<Chemistry>
Summary
| 2024 ACF Regionals @ Berkeley | 01/27/2024 | Y | 2 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Regionals @ JMU | 01/27/2024 | Y | 5 | 12.00 | 60% | 60% | 0% |
| 2024 ACF Regionals @ Minnesota | 01/27/2024 | Y | 2 | 15.00 | 100% | 50% | 0% |
| 2024 ACF Regionals @ Nebraska | 01/27/2024 | Y | 4 | 7.50 | 50% | 25% | 0% |
| 2024 ACF Regionals @ Ohio State | 01/27/2024 | Y | 1 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Regionals @ Rutgers | 01/27/2024 | Y | 5 | 20.00 | 80% | 60% | 60% |
| 2024 ACF Regionals @ Imperial | 01/27/2024 | Y | 7 | 14.29 | 100% | 43% | 0% |
| 2024 ACF Regionals @ Vanderbilt | 01/27/2024 | Y | 4 | 15.00 | 75% | 50% | 25% |
Data
| Claremont A | Texas A | 10 | 0 | 0 | 10 |
| UW A | Rice A | 0 | 0 | 0 | 0 |
| Texas A&M A | UBC A | 0 | 0 | 0 | 0 |
| Michigan State A | Texas A&M B | 10 | 0 | 10 | 20 |