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本文合成了六种新的二茂镱苯甲酸衍生物:Cp_2YbOCOC_6H_4(o-OC_2H_5),Cp_2YbOCOC_6H_4-(o-OCH_2CH_2CH_3),Cp_2YbOCOC_6H_4(o-Cl),Cp_2YbOCOC_6H_4(o-Br),Cp_2YbOCOC_6H_4(o-I)及Cp_2YbOCOC_6H_4(D-NHC_6H_5)。这些化合物经元素分析、红外光谱、质谱及光电子能谱鉴定,确证为羧酸阴离子与二茂镱的桥式配位二聚体结构。分子中苯甲酸阴离子的邻位取代基上的配位原子(O,Cl,Br,I,N)与镱均有微弱的络合。这些化合物在空气中均较它们的母体(Cp_2YbOCOC_6H_5)稳定。
In this paper, six new ytterbium (2-ytterbyl) benzoic acid derivatives were synthesized: Cp_2YbOCOC_6H_4 (o-OC_2H_5), Cp_2YbOCOC_6H_4- (o-OCH_2CH_2CH_3), Cp_2YbOCOC_6H_4 (o-Cl), Cp_2YbOCOC_6H_4 (oI) and Cp_2YbOCOC_6H_4 (D-NHC_6H_5). These compounds were identified by elemental analysis, infrared spectroscopy, mass spectrometry and photoelectron spectroscopy, confirming the bridged dimer structure of the carboxylic acid anion and the ytterbium titanate. Coordination atoms (O, Cl, Br, I, N) on ortho-substituents of benzoic acid anions in the molecule are weakly complexed with ytterbium. These compounds are more stable in air than their parent (Cp_2YbOCOC_6H_5).