【摘要】 通过乙酰基二茂铁与酯的缩合反应，合成了五个二茂铁基长链烷基β─二酮化合物ＦｃＣＯＣＨ＿２ＣＯＣ＿ｎＨ＿（２ｎ＋１）（Ｆｃ＝Ｃ＿５Ｈ＿５ＦｅＣ＿５Ｈ＿４，ｎ＝５～９）。用元素分析、ＵＶ─Ｖｉｓ、ＩＲ、１￣ＨＮＭＲ、ＭＳ对化合物进行了表征。测试结果表明，β─二酮化合物仅以烯醇形式存在。更多还原

【Abstract】 he five new Ferrocenyl long-chain alkyl β-diketones with a general formulaC₅H₅FeC₅H₄COCH₂COC_nH_2n+1 （n=5-9） were synthesized by Claisen condensation of acetylferro-cene with ester. These compounds were characterized by elementary analysis, UV-Vis,IR, 1￣HNMR and MS spectra. The β-diketones show a sawtoothed increase in melting point withincreasing carbon number of alkyl group. There are three absorption bands at about 268nm,310nm and 452nm in the UV-Vis spectra. The absorption band observed at 310nm is due to the π-π￣* transition of intramolecular hydrogen bonded chelate ring. The IR spectra show the character-istic absorptions of η￣5-Cp group at about 3104cm￣（-1）, 1112cm￣（-1）, 1004cm￣（-1） and 824cm￣（-1）, and ν_OH,ν（O-C）、ν（C-O） for the enol form near 3432cm￣（-1）、1619cm￣（-1） and 1554cm￣（-1）. In 1￣HNMR spectra, the pres-ence of OH protonic chemical shifts in the 15.90～15.70×10￣（-6） region also indicate that the exis-tent state of the β-diketones is in the enol form. The molecular ion peak at m/e 354 （relative in-tensity 86%）, and peaks of major cationic fragments C₅H₅FeC₅H₄C≡O￣+ （m/e213, 28%）,[C₅H₅FeC₅H₄]￣+ （m/e185, 57%） and +￣O≡CCH₂COC₇H₁₅ （m/e169, 36%） in the FAB-mass spec-trum of compound Ⅲ was observed.更多还原