• 作者： Huang, Ting-Chia; Lin, Sy-Chyi
• 中文摘要： 在氫氧化鈉存在下,以碘化四丁基銨為相轉移觸媒,針對異丁醛和氯進行烷化反應作動力學探討。主產物經銀鏡反應,紅外線光譜,氣相色層分析質譜及核磁共振光譜鑑定為2,2-二甲基-3-苯基正丙醛。於343K下測定碘化四丁基銨在不同氫氧化鈉濃度下之分配係數顯示在甲苯溶液中有極高之分配。由實驗獲知反應速率可用式R/sub DMPPA/=K/sup 0//sub app/ x C/sup 2/3//sub TBAI/ x C/sub BC/表示。在不同反應條件下獲得示反應速率常數及轉化分率。最後依實驗結果提出反應機構以描述此反應系。
• 英文摘要： The kinetics of alkylation of isobutyraldehyde with benzyl chloride in the presence of 30 weight percent sodium hydroxide aqueous solution was studied by using tetrabutylammonium iodide as the phase transfer catalyst. The main product was identified to be 2,2-dimethyl-3-phenyl- n-propylaldehyde(DMPPA) by silver mirror test, I.R., G.C./ M.S., and FTNMR spectra. Partition equilibrium measurements at 343K showed that tetrabutylammonium iodide is preferentially present in the organic phase and the ratio of concentration of tetrabutylammonium cation in organic phase to that in aqueous phase increases as the concentration of sodium hydroxide in aqueous increases from 0 to 30 weight percent. The formation rate of DMPPA may be expressed as: R/ sub DMPPA/=K/sup 0//sub app/ x C/sup 2/3//sub TBAI/ x C/sub BC/. The apparent rate constants and fractional yields of DMPPA at different conditions were studied. Finally, we proposed a mechanism to explain the experimental results.
• 中文關鍵字： 動力學研究; 烷化作用; 異丁醛; 氯; 相轉移; 相轉移觸媒; 碘化四丁基銨
• 英文關鍵字： Kinetic Study; Alkylation; Isobutyraldehyde; Benzyl Chloride; Phase Transfer; Phase Transfer Catalyst; Tetrabutylammonium Iodide