For 10 points, name these organometallic reagents, most commonly used as nucleophiles for reducing carbonyl groups to alcohols, which could be known as alkyl or aryl magnesium halides.
The efficacy of the Boord olefin synthesis prevents ones with vicinal alkoxy groups from being synthesized. Particularly hindered ones react by single-electron transfer, but normally their namesake reaction uses two equivalents of them to generate a six-membered ring for a transition state. Reactions involving them must be carried out in aprotic solvents, and the only way to produce ones incorporating fluorine requires a metal powder named for Rieke. For 10 points, name these organometallic reagents, most commonly used as nucleophiles for reducing carbonyl groups to alcohols, which could be known as alkyl or aryl magnesium halides.
The efficacy of the Boord olefin synthesis prevents ones with vicinal alkoxy groups from being synthesized.
Grignard reagents [prompt on alkyl magnesium halides or aryl magnesium halides]