摘要
本文采用分配法研究了二甲基亚砜-丙酮-水溶液中硫氰酸钼(V)络合物的性质。三个络合物MoO(SCN)^(2+),MoO(SCN)_2^+和MoO(SCN)_3的稳定常数分别为β_1=46.1,β_2=1040,β_3=12259,其各级络合物的摩尔吸光系数分别是△ε_1=0.59×10~4L·mol^(-1)·cm^(-1),△ε_2=0.94×10~4L·mol^(-1)·cm^(-1)和△ε_3=1.4×10~4L·mol^(-1)·cm^(-1),研究了该络合物的生成机理,发现以CCI_4,为萃取剂效果不好,如在CCI_4中加入少量溴化十六烷基三甲基铵后萃取效果与前人使用CHCI_3相类似。
The properties of molybdenum (Ⅴ) thiocyanate complexes in the dimethyl sulfoxide (DMSO) -acetone aqueous solution have been studied. Stability constants of the three coordination compounds, MoO(SCN)^(2+), MoO(SCN)_2^+, MoO(SCN)_3, are 46.1, 1040 and 12259, and molar absorptivities are 0.59×10~4, 0.97×10~4, 1.4×10~4L·mol^(-1)·cm^(-1), respectively. The reaction mechanism of the complexes has been studied by partition method. Experimental result shows that the extraction effect using CCI_4 as an extractant is poor. In the presence of trace CTMAB, the extraction effect using CCI_4 approaches that using CHCI_3.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1992年第5期549-552,共4页
Chinese Journal of Analytical Chemistry
关键词
硫氰酸钼
混合溶剂
分配法
Molybdenum(Ⅴ) thioeyanate, Partition method, Mixed solvent.
