Palladium(I) and palladium(II) unsaturated carboxylate complexes with small molecules: Synthesis and X-ray structure of Pd4(μ-CO)4(μ-trans-CH3CHCHCO2)4 and Pd4(μ-NO)2(μ-CH2C(CH3)CO2)6
作者:Oleg N. Shishilov、Polina V. Ankudinova、Elena V. Nikitenko、Andrei V. Churakov、Irina A. Garbuzova、Nailya S. Akhmadullina、Natalia A. Minaeva、Lyudmila I. Demina、Inessa A. Efimenko
DOI:10.1016/j.jorganchem.2014.05.011
日期:2014.9
α-unsaturated carboxylic acids. The acidity of the used acids RCO2H (pKa = 4.25–4.68) lies between acidity of acetic (R = CH3, pKa = 4.76) and monochloroacetic (R = CH2Cl, pKa = 2.85) acids, so we assumed that properties of corresponding palladium complexes should be close to properties of acetates and monochloroacetates, which are very similar. That is perfectly confirmed by obtained data for two classes of
新钯(I)的Pd 4(μ-CO)4(μ-RCO 2)4(1)和钯(II)的Pd 4(μ-NO)2(μ-RCO 2)6(2)(R = CH 2 CH,CH 2 C(Me),反式-MeCH CH,反-CH 3 CH C(CH 3),反式-PhCH制备CH 2羧酸盐配合物,并通过X射线衍射分析确定其结构。较早的具有烷基取代基的羧酸盐配合物表明,它们的性质取决于取代基的电子性质,并且与相应羧酸的强度密切相关。在此,我们描述了α-不饱和羧酸的羧酸盐的相同趋势。 废酸RCO 2 H的酸度(p K a = 4.25–4.68)介于乙酸(R = CH 3,p K a = 4.76)和一氯乙酸(R = CH 2 Cl,p K a)之间 = 2.85)的酸,因此我们假设相应的钯配合物的性质应接近于乙酸盐和一氯乙酸盐的性质,两者非常相似。通过获得的两类多核羧酸钯钯配合物(1和2)的数据可以完美地证实这一点。