Ligands containing elements of Group VIB. Part III. The silver complexes of saturated and unsaturated (alkylthio)acetic and p-(alkylthio)benzoic acids
作者:L. D. Pettit、C. Sherrington
DOI:10.1039/j19680003078
日期:——
p-(alkylthio)benzoic acids of general formula RSCH2·CO2H and p-RS·C6H4·CO2H(HL) where R is Me, Et, Prn, Bu8, Bun, n-C5H11, n-C6H13, PhCH2, Ph, CH2:CH·CH2, CH2:CH·(CH2)2, and CH2:CH(CH2)3, has been prepared and the acid dissociation constants of the acetic acids measured at 25° and µ= 0·10M(KNO3). The formation constants of the silver complexes, AgL (µ= 0·1 or 0·2M), of all the ligands and of the protonated
一系列通式为RSCH 2 ·CO 2 H和p -RS·C 6 H 4 ·CO 2 H(HL)的(烷硫基)乙酸和对-(烷硫基)苯甲酸,其中R为Me,Et,Pr n, Bu 8,Bu n,nC 5 H 11,nC 6 H 13,PhCH 2,Ph,CH 2:CH·CH 2,CH 2:CH·(CH 2)2和CH 2:CH(CH 2)3制备了α,并且在25°和μ= 0· 10M(KNO 3)下测量了乙酸的酸解离常数。已测量了所有配体的银配合物AgL(µ = 0·1或0·2 M)的形成常数和乙酸的质子化银配合物AgHL(µ = 0·20 M)的形成常数在25°的乙酸盐缓冲溶液中。稳定性随取代基的感应效应而变化(以塔夫脱σ *函数表示),表明σ的变化硫和银原子之间的化学键是导致发现的自由能变化的主要因素。从该假设可以预期,苯基与硫原子的键合显着降低了配合物的稳定性。当取代基为丁-1-烯基时,不饱和配体