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Measurements of binary diffusion coefficients for metal complexes in organic solvents by the Taylor dispersion method

机译：泰勒分散法测量有机溶剂中金属配合物的二元扩散系数

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Infinite dilution binary diffusion coefficients, D_(12), of ferrocene, 1,l'-dimethylferrocene and ethylfer-rocene in hexane, cyclohexane and ethanol at 313.2 K and pressures from 0.2 to 19 MPa, in acetonitrile at 298.2-333.2 K and 0.2 MPa, and various metallic acetylacetonate, acac, complexes such as Co(acac)3,Ru(acac)3, Rh(acac)3, Pd(acac)2 and Pt(acac)2 mainly in ethanol at 313.2 K and 0.2 MPa were measured by the Taylor dispersion method. The D_(12) values in m2 s~(?1) for the three ferrocenes in the present study and those of ferrocene and 1, l'-dimethylferrocene in supercritical carbon dioxide in our previous studies were represented by the modified hydrodynamic equation over a wide range of viscosity: M~(0.5)D_(12)/T= 1.435 × 10~(-13)η-~(0.8446) with average absolute relative deviation of 2.40% for 316 data points,where M is the solute molecular weight, T is the temperature in K, η is the solvent viscosity in Pas. Although the D_(12) values for the acac complexes were roughly represented by the above hydrodynamic equation, the accuracies were lower because they were dependent on not solute molecular weight but the number of acac ligand in the complex molecules.
机译：二茂铁，1，l'-二甲基二茂铁和乙基二茂铁在己烷，环己烷和乙醇中于313.2 K，压力为0.2至19 MPa于298.2-333.2 K和0.2的乙腈中的无限稀释二元扩散系数D_（12） MPa以及主要在乙醇中以313.2 K和0.2 MPa压制的各种金属乙酰丙酮酸，acac，Co（acac）3，Ru（acac）3，Rh（acac）3，Pd（acac）2和Pt（acac）2等络合物通过泰勒分散法测量。本研究中的三种二茂铁以及超临界二氧化碳中的二茂铁和1，l'-二甲基二茂铁的D_（12）值以m2 s〜（？1）为单位，由a粘度范围广：M〜（0.5）D_（12）/ T = 1.435×10〜（-13）η-〜（0.8446），对于316个数据点，平均绝对相对偏差为2.40％，其中M为溶质分子重量，T是温度，单位为K，η是溶剂粘度，单位为Pas。尽管acac配合物的D_（12）值大致由上述流体力学方程式表示，但精度较低，因为它们不仅取决于溶质分子量，还取决于配合物分子中acac配体的数量。

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