- 作者: 廖文峰 ; 劉珍如 ; 賴佳惠
- 作者服務機構: 彰化師範大學化學系
- 中文摘要: The anionic [ MeSeFe(CO)/sub 4//sup -/ ] and [ MeSeCr(CO)/sub 5//sup -/ ] complexes were synthesized by reaction of [ PPN ] [ HFe(CO)/sub 4/ ] and [ PPN ] [ HCr(CO)/sub 5/ ] with MeSeSeMe respectively via nucleophilic cleavage of the Se-Se bond. The ease of cleavage of the Se-Se bond follows the nucleophilic strength of metal-hydride complexes. Methylation of [ RSeCr(CO)/sub 5//sup -/ ] by the soft alkylating agent MeI resulted in the formation of neutral (MeSeMe)Cr(CO)/sub 5/ in THF at 0.degree .C. In contrast, the [ ICr(CO)/sub 5//sup -/ ] was isolated at ambient temperature. Reaction of [ MeSeFe(CO)/sub 4//sup -/ ] or [ MeSeCr(CO)/sub 5//sup -/ ] with HBF/sub 4/ yielded (CO)/sub 3/Fe(.mu.-SeMe)/sub 2/Fe(CO)/sub 3/ dimer and anionic [ (CO) /sub 5/Cr(.mu.-SeMe)Cr(CO)/sub 5//sup -/ ] respectively, and no neutral (HSeMe)Fe(CO)/sub 4/ and(HSeMe)Cr(CO)/sub 5/ were detected spectrally (IR) even at low temperature. Reaction of NOBF/sub 4/ or [ Ph/sub 3/C ] [ BF/sub 4/ ] and [ MeSeCr(CO)/sub 5 //sup -/ ] resulted in the neutral monodentate (MeSeSeMe)Cr(CO)/sub 5/ complex. Addition of 1 equiv. CpFe(CO)/sub 2/I to 2 equiv. [ MeSeCr(CO)/sub 5//sup -/ ] gave CpFe(CO)/sub 2/(SeMe) and the anionic [ (CO)/sub 5/Cr(.mu.-SeMe)Cr(CO)/sub 5//sup -/ ] in THF at ambient temperature.
- 英文摘要: --
- 中文關鍵字: Alkylselenate; Selenoether; Monodentate; Nucleophilic Cleavage Reaction; Metal-Hydride Complex; Oxidative Coupling
- 英文關鍵字: 烷基硒酸鹽;硒醚;單牙團;親核斷鍵反應;金屬氫化物錯合物;氧化耦合