Cyclobutanolates undergoing one of these reactions can be used to construct seven-member ring frameworks. Quaternary ammonium compounds treated with silver oxide (10[2]-5[1])can undergo (10[1])one of these reactions. (10[4]-5[1])A concerted (-5[1])form of these reactions (10[2])creates anti-periplanar (10[1])products. (10[3]-5[1])Alkyl halides (10[1])can be transformed (10[1]-5[1])with these (10[1])reactions using (-5[1])DBU (10[1])and other (10[1])strong bases. (10[3])Competition (10[1])between (10[2])kinetics (10[1])and thermodynamics (10[1])during these (10[1])reactions (10[1]-5[1])can lead to products named for either (-5[1])Hofmann (10[2]-5[1])or (10[1]-5[1])Zaitsev. (10[14]-5[3])The (10[3])“1cB” (10[3]-5[3])form (10[2])of this (10[1])reaction (10[2]-5[2])occurs when (10[1])a poor leaving group is present (-5[1])on the alpha (10[1])carbon (10[1])in these (10[1])pi-bond forming (-5[1])reactions. (10[4])For 10 points, (10[2]-5[1])name these general reactions (10[2]-5[1])that can form (-5[2])alkenes (10[2]-5[1])through either E1 or E2 (10[2])mechanisms. (10[2]0[2])■END■ (10[17]0[47])