- 作者: 林弘萍 ; 呂正榕 ; 卓靜哲
- 作者服務機構: 成功大學化學系
- 中文摘要:
In aqueous acidic acetonitrile solution cerium(IV) oxidizes diphenylmethane (Ph/sub 2/CH/sub 2/) to produce diphenylmethanol (Ph/sub 2/CHOH) first and then benzophenone(Ph/sub 2/CO). With the organic reductant in great excess, both the Ce(IV)-Ph/sub 2/CH/sub 2/ and Ce(IV)-Ph/sub 2/CHOH reactions follow second-order kinetics. The rates of both reactions increase nonlinearly with increasing [ H/sup +/ ] or with decreasing [ H/sub 2/O ] . Both kinetic and spectrophotometric results indicate that replacement of water molecules by complex formation through the phenyl or hydroxyl group plays an important role in activating the reaction. Under similar conditions, the order of relative reactivities toward Ce(IV) oxidation is PhCH/sub 2/OH> CH/sub 3/CH/sub 2/OH>Ph/sub 2/CHOH>Ph/sub 2/CH/sub 2/> PhCH/sub 3/
(Ph/sub 2/CO, C/sub 6/H/sub 6/). Mechanistic interpretations of the kinetic results are presented. - 英文摘要: --
- 中文關鍵字: Diphenylmathane; Oxidation; Kinetics; Cerium Ion
- 英文關鍵字: 二苯甲烷;氧化;動力學;鈰離子