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在1951年用溶度法研究硫氰酸鉛絡合物,认为溶液中有Pb(SCN)_3~-和Pb(SCN)_6~(==)两种絡合物,其稳定常数为K_3=10,K_6=0.5。Leonard等在1956年用极譜法研究,认为溶液中有PbSCN~+,Pb(SCN)_2和Pb(SCN)_4~=三种络合物,其稳定常数为K_λ=3.5,K_2=7.5和K_4=7.0。岩瀨秋雄在1957年也用极譜法研究,认为溶液中有PbSCN~+,Pb(SCN)_2和Pb(SCN)_3~-三种絡合物,其稳定常数为K_1=0.05,K_2=0.13和K_3=0.08。同年等分別用分光光度法和电势法研究了这一体系。由分光光度法証明有Pb(SGN)_2和Pb(SCN)_5~≡二种絡合物,由电势法得到的則是PbSCN~+和Pb(SCN)_2二种絡合物,后者
In 1951, the lead thiocyanate complex was studied by the solubility method. The two complexes of Pb (SCN) _3 ~ - and Pb (SCN) _6 ~ (==) were considered to have the stability constants of K_3 = 10, K_6 = 0.5. In 1956, Leonard et al. Used polarography to study the three complexes of PbSCN ~ +, Pb (SCN) 2 and Pb (SCN) _4 ~ = in the solution. The stability constants are K_λ = 3.5, K_2 = 7.5 and K_4 = 7.0. Akito Iwase in 1957 also polarography, that the solution has PbSCN ~ +, Pb (SCN) _2 and Pb (SCN) _3 ~ - three complexes, the stability constant K_1 = 0.05, K_2 = 0.13 and K_3 = 0.08. In the same year, the system was studied by spectrophotometry and potentiometry respectively. Two complexes of Pb (SGN) _2 and Pb (SCN) _5 ~ ≡ were identified by spectrophotometry. Two potential complexes of PbSCN ~ + and Pb (SCN) _2 were obtained by potentiometry.