Synthesis and Characterization of Some New Organophosphonates and Their Adducts with Some Metal Salts
作者:Ebtsam A. Saad、Ramadan M. Ramadan
DOI:10.1246/bcsj.62.3697
日期:1989.11
The synthesis of the new monobasic organophosphonates (C2H5O)RPO(OH), R=benzyl, benzoyl, or butanoyl group, by the hydrolysis of the neutral esters (C2H5O)2RPO is reported. The IR spectra of the new ligands showed that they were existed in solutions as dimers. The pKa values in 50% aqueous ethanol found to be 4.46, 3.98, and 3.48 for the benzyl, butanoyl, and benzoyl derivatives, respectively. These
报道了通过中性酯 (C2H5O)2RPO 的水解合成新的一元有机膦酸酯 (C2H5O)RPO(OH),R=苄基、苯甲酰基或丁酰基。新配体的红外光谱表明它们以二聚体形式存在于溶液中。发现苄基、丁酰基和苯甲酰基衍生物在 50% 乙醇水溶液中的 pKa 值分别为 4.46、3.98 和 3.48。这些值与计算的 π 电子电荷密度一致。分离出苯甲酰膦酸酯与 Pr、Eu、Er 和 Co 金属离子的固体配合物以及苄基-Eu 配合物。发现复合比为 1:2 金属与膦酸酯二聚体。八面体排列由协调的双齿 NO3 基团的存在完成。从电导测量中排除了这些复合物的离子特性。