Solvation behaviour of some copper (I), silver (I) and tetrabutylammonium salts has been investigated in binary mixtures of acetonitrile and adiponitrile containing 100, 90, 80, 70, 60 and 50 mol % AN at 298 K using molar conductance and viscosity measurements. The conductance data have been analyzed by using the Shedlovsky method to calculate limiting molar conductance (Λo) of the electrolytes. The solvated radii for various ions indicate that tetrabutylammonium (Bu4N+) and tetraphenylborate (BPh4 –) are not solvated in all AN+ADN mixtures. The anions are poorly solvated but Cu+ and Ag+ are highly solvated in AN+ADN mixtures. The extent of solvation of Cu+ is greater then that of Ag+. The solvation of these both ions increases in ADN rich region of the mixtures. The viscosity data have been analyzed by using the Jones-Dole equation to calculate viscosity B-coefficients of electrolytes. The ionic B± coefficients for individual ions have been evaluated. The results show that anions are weakly solvated in whole composition range of AN + ADN mixtures. The B+ coefficients for Cu+ and Ag+ increase with increase in ADN composition i.e. these are better solvated in ADN rich region of binary mixtures. The viscosity results are in good agreement with the results obtained from the conductance studies.
本研究使用摩尔电导率和粘度测量,研究了在含有100, 90, 80, 70, 60和50摩尔%的乙腈和己二腈的二元混合物中,一些铜(I)、银(I)和四丁基铵盐的溶解行为。使用Shedlovsky方法分析电导数据,计算电解质的极限摩尔电导率(Λo)。各种离子的溶剂化半径表明,四丁基铵(Bu4N+)和四苯基硼酸盐(BPh4-)在所有AN + ADN混合物中均未被溶剂化。阴离子溶剂化较差,但Cu+和Ag+在AN + ADN混合物中高度溶剂化。Cu+的溶剂化程度大于Ag+。这两种离子的溶剂化在混合物的ADN丰富区域增加。使用Jones-Dole方程分析粘度数据,计算电解质的粘度B系数。评估了各个离子的离子B±系数。结果表明,阴离子在AN + ADN混合物的整个组成范围内均溶解较弱。Cu+和Ag+的B+系数随着ADN组分的增加而增加,即在ADN丰富的二元混合物中更易溶解。粘度结果与电导研究结果相符。
Ultrasonic velocities and densities of some copper(I) and silver(I) salts have been measured in the concentration range 0.002–0.28 mol kg−1 in binary mixtures of acetonitrile (AN) +
在含有100、80、60、40、20和0 mol%乙腈(AN)+ N,N-二甲基乙酰胺(DMA)的二元混合物中,在浓度范围0.002-0.28 mol kg-1下,测量了一些铜(I)和银(I)盐的超声速度和密度,温度为298 K。通过使用超声速度(u)和部分摩尔体积(Vφ)分别计算了各种溶剂体系中的等熵压缩性(Ks)和表观摩尔等熵压缩性。从vs.m1/2图中评估了各种盐的极限表观摩尔等熵压缩性(Ks,φ0),并将其分为各个离子的贡献(Ks,φ0)±。发现铜(I)和银(I)离子的(Ks,φ0)±值在整个组成范围内均为负值,表明这些复杂离子的溶剂化很强。这些离子的(Ks,φ0)±值随DMA组成的增加而增加,表明溶剂化程度随DMA组成的增加而增加。