Question
The Law of Matching Water Affinities predicts the formation of the “contact” type of these species. For 10 points each:
[10h] Name these species, which name a type of chromatography in which alkylsulfonates and alkylammoniums are used to form them. Saul Winstein invoked these species to explain the preference for inversion in SN1 reactions.
ANSWER: ion pairs [accept intimate ion pair; accept contact ion pair; accept ion pair chromatography; prompt on IPC; reject “ion association”]
[10e] Ion pairs are formed through ion association, which can also produce one of these noncovalent interactions consisting of hydrogen bonds and ionic bonds. These “bridges” link acidic and basic amino acid residues.
ANSWER: salt bridges
[10m] The likelihood of ion association depends greatly on this quantity for the solvent, which characterizes the polarity of the solvent with respect to the vacuum. This dimensionless quantity is 78.4 for liquid water.
ANSWER: dielectric constant [or relative permittivity; prompt on permittivity or epsilon or kappa]
<AW/KP, Chemistry>
Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2024 Chicago Open | 07/28/2024 | Y | 12 | 4.17 | 33% | 8% | 0% |