Question

An alkoxide of this metal is used to catalyze the disproportionation of aldehydes through a hemiacetal intermediate in the Tishchenko reaction. (10[1])A compound containing this metal is used for the conjugate addition of cyanide to alpha, beta-unsaturated carbonyls in a reaction named for Nagata. Chelation of this metal to the methoxy group of a Weinreb amide (10[1])allows it to be reduced to an aldehyde (10[1])by a reagent containing (-5[1])this metal and two isobutyl groups. (10[1]-5[1])Titanocene (-5[1])dichloride (-5[1])is reacted with a complex (-5[1])containing this metal to generate Tebbe’s reagent. (10[2]-5[1])Either iron (10[1])chloride or (10[1])this metal’s chloride (10[1])can be used as Lewis acids (10[2])during (10[1])Friedel–Crafts (10[1])reactions. A (10[1])reducing agent stronger than sodium borohydride contains lithium, this metal, (10[2])and four hydrogen atoms. For 10 points, name this lightweight (10[1])metal (10[1])produced via the Hall–Héroult (10[1])process. (10[2])■END■ (10[3])

ANSWER: aluminum [accept AlCl3 or aluminum trichloride; accept trimethylaluminum; accept diisobutylaluminum hydride; prompt on lithium aluminum hydride or LAH; prompt on DIBAL]
<Chemistry>
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Summary

2025 ACF Nationals04/19/2025Y24100%0%25%101.04

Buzzes

PlayerTeamOpponentBuzz PositionValue
Matt SchiavoneNorthwesternIllinois A2010
Allan LeeStanfordColumbia A5510
Richard NiuCornell AIowa State6310
Bryan UgazArizona StateFlorida67-5
Anurag SodhiMITGeorgia Tech7310
Alex AkridgeIndianaToronto A73-5
Rasheeq AzadNorth Carolina AChicago A74-5
Sinecio MoralesJohns HopkinsToronto B75-5
James WangOttawaYale80-5
Russell NipBritish ColumbiaUC Berkeley B87-5
Caleb OttWaterloo BPenn State8710
Calvin BostlemanOhio StateWinona State8710
Ryan RosenbergNYUGeorgia State8910
Liam KusalikWaterloo AWUSTL A9110
Kushal AluruRutgersUC Berkeley A9410
Ilyas ChoukriVirginia TechToronto C10010
Derek ChenColumbia BVirginia10010
Karan GurazadaTexasChicago B10110
Shiva TegullaUCFRIT10210
Rachel FanousMichiganVanderbilt10410
June YinWUSTL BLSE11410
Shardul RaoMinnesotaHarvard11410
Tiffany ZhouFloridaArizona State12410
Andres CordobaYaleOttawa12510
Shardul ParthasarathyIllinois BNorth Carolina B12910
Yared TadesseCornell BMaryland13010
Adam FineChicago ANorth Carolina A13010
Tony ChenToronto AIndiana13110
Raymond ChenToronto BJohns Hopkins13110
Vinu HariharUC Berkeley BBritish Columbia13110