Question
A class of interactions partially named for these structures studied by Dougherty and Gallivan depends on inverse distance to a power less than 2. An interaction named for these structures is described by the controversial Hunter–Sanders model, which explains the effect of EWGs and EDGs on quadrupoles. That interaction named for these structures occurs in “T-shaped” and “parallel displaced” orientations. Electrons in a metal can stabilize a vacant adjacent orbital in an interaction named for these structures that commonly occurs with CO ligands. Instances of these structures have orthogonal orientations in allenes and cumulenes. Parallel instances of these structures mix in conjugated systems. For 10 points, name these structures that arise due to the parallel overlap of p orbitals. ■END■
ANSWER: pi (“pie”) bonds [or pi orbitals; accept pi-systems, pi–pi stacking, pi backbonding, or cation–pi interactions; prompt on bonds; prompt on double bonds or triple bonds or alkenes or alkynes or arenes]
<MY, Chemistry>
= Average correct buzz position
Summary
| Florida | 2025-02-01 | Y | 3 | 100% | 0% | 0% | 107.67 |
| Great Lakes | 2025-02-01 | Y | 6 | 50% | 0% | 67% | 106.67 |
| Lower Mid-Atlantic | 2025-02-01 | Y | 6 | 83% | 0% | 17% | 118.80 |
| Midwest | 2025-02-01 | Y | 2 | 100% | 0% | 0% | 56.50 |
| North | 2025-02-01 | Y | 3 | 100% | 0% | 33% | 119.00 |
| Northeast | 2025-02-01 | Y | 5 | 60% | 0% | 40% | 94.33 |
| Overflow | 2025-02-01 | Y | 5 | 100% | 0% | 40% | 91.40 |
| Pacific Northwest | 2025-02-01 | Y | 2 | 100% | 0% | 0% | 117.00 |
| Southeast | 2025-02-01 | Y | 4 | 100% | 0% | 0% | 114.50 |
| UK | 2025-02-01 | Y | 10 | 90% | 0% | 40% | 112.33 |
| Upper Mid-Atlantic | 2025-02-01 | Y | 8 | 75% | 0% | 38% | 101.17 |
| Upstate NY | 2025-02-01 | Y | 3 | 67% | 0% | 33% | 119.00 |
Buzzes
| Player | Team | Opponent | Buzz Position | Value |
|---|---|---|---|---|
| Andrew Wang | Illinois A | Chicago A | 55 | 10 |
| Matthew Westley | Purdue | Iowa | 55 | 10 |
| Braden Booth | Missouri | Chicago B | 58 | 10 |
| Calvin Bostleman | Ohio State A | Michigan State | 59 | -5 |
| Jaz the Mononymous | Southampton B | Cambridge C | 59 | -5 |
| Yrwin Batan | MIT A | Dartmouth A | 65 | -5 |
| David Bass | Johns Hopkins A | George Washington A | 65 | -5 |
| Cormac Stephenson | Southampton A | Cambridge B | 72 | -5 |
| Sharath Narayan | Northwestern A | Notre Dame B | 76 | 10 |
| Rachel Fanous | Michigan A | Michigan C | 82 | 10 |
| Foster Hughes | Minnesota B | Iowa State | 82 | -5 |
| Joy An | Harvard A | UMass Boston | 82 | -5 |
| Mason Yu | Brown A | Brandeis B | 82 | 10 |
| Arjun Bothra | Haverford A | Rutgers A | 82 | 10 |
| Noah Chen | Columbia B | Penn B | 82 | 10 |
| Max Neal | Harvard B | Brandeis A | 83 | 10 |
| Eugenia Tong | Imperial B | Oxford C | 83 | 10 |
| Ryan Rosenberg | NYU A | Haverford B | 86 | 10 |
| Allan Lee | Stanford B | Georgetown B | 88 | 10 |
| Arya Karthik | Oxford A | Bristol | 89 | -5 |
| Derek Chen | Columbia C | Yale A | 93 | -5 |
| Elijah O’Sick Johnson | Binghamton A | ESF A | 93 | -5 |
| Michael Eng | UNC C | Virginia A | 94 | -5 |
| Brendan Bethlehem | Cambridge A | Manchester | 95 | 10 |
| Tiffany Zhou | Florida A | Valencia A | 102 | 10 |
| Bill Zhao | Florida B | UCF C | 102 | 10 |
| Enina Edosomwan | Case Western A | Carnegie Mellon A | 102 | -5 |
| Biyang Zhang | Michigan B | Michigan D | 102 | -5 |
| Jacob Finley | Notre Dame A | Georgetown A | 102 | -5 |
| Samir Sarma | Georgia Tech D | Georgia Tech A | 102 | 10 |
| Richard Niu | Cornell B | NYU B | 102 | -5 |
| Jack Lenga | Carnegie Mellon B | Kenyon | 105 | -5 |
| Hamish Campbell | Durham | NYU C | 108 | -5 |
| Azura Gollamudi | Northwestern B | Notre Dame C | 115 | -5 |
| Russell Nip | UBC | UW B | 115 | 10 |
| Chris Yoo | William & Mary | Wake Forest | 118 | 10 |
| Isaac Meredith | Tufts A | BU | 118 | 10 |
| Rohan Dalal | Georgia Tech C | Georgia Tech B | 118 | 10 |
| Juan Landaeta | Florida State A | UCF B | 119 | 10 |
| Peter Ballas | Michigan D | Michigan B | 119 | 0 |
| Aditya Patnaik | Ohio State B | Case Western B | 119 | 10 |
| Stevie Miller | Carnegie Mellon A | Case Western A | 119 | 10 |
| Noah Dean | Kenyon | Carnegie Mellon B | 119 | 0 |
| Jacob Egol | Duke | Liberty B | 119 | 10 |
| Connor Ronan | South Carolina | Liberty C | 119 | 10 |
| Joseph Chambers | Virginia A | UNC C | 119 | 0 |
| Josh Schmidt | Liberty A | UNC D | 119 | 10 |
| Rasheeq Azad | UNC B | Virginia Tech A | 119 | 10 |
| Alex Smits | Wisconsin B | Carleton | 119 | 10 |
| Conor Thompson | Iowa State | Minnesota B | 119 | 10 |
| Henry Bon | Winona State | Wisconsin A | 119 | 10 |
| Elliott Gomes | Dartmouth A | MIT A | 119 | 0 |
| Patrick Boyle | Notre Dame C | Northwestern B | 119 | 10 |
| Cole Hartung | Georgetown A | Notre Dame A | 119 | 10 |
| Jonathan Ho | Alberta | UW A | 119 | 10 |
| Harris Beckner | Alabama A | Vanderbilt A | 119 | 10 |
| Jack Lewis | Bruin A | Louisville A | 119 | 10 |
| Yuxuan Lu | Vanderbilt A | Alabama A | 119 | 0 |
| Tobin Payne | Warwick B | Cambridge D | 119 | 10 |
| Arvin Boraghi | Cambridge C | Southampton B | 119 | 10 |
| Adsayan Ganesh | Warwick A | Cambridge E | 119 | 10 |
| Rachel Bentham | Cambridge B | Southampton A | 119 | 10 |
| Kevin Flanagan | Bristol | Oxford A | 119 | 10 |
| Rahim Dina | Imperial A | Oxford B | 119 | 10 |
| Andy Huff | LSE | Sheffield | 119 | 10 |
| Lewis Strachan | Cambridge E | Warwick A | 119 | 0 |
| Jacob Hardin-Bernhardt | NYU C | Durham | 119 | 0 |
| Hrishit Chaudhuri | NYU B | Cornell B | 119 | 10 |
| Jerry Vinokurov | John Jay College | George Washington B | 119 | 10 |
| Andy Yu | Maryland A | Maryland B | 119 | 10 |
| Frederick Rivas-Giorgi | Yale A | Columbia C | 119 | 0 |
| Gregory Stone | ESF A | Binghamton A | 119 | 0 |
| Pranaav Senthilkumar | Cornell D | Cornell C | 119 | 10 |
| Cade Reinberger | RIT A | RIT B | 119 | 10 |