Cr^(3+)水解聚合作用的研究(Ⅷ)——反丁烯二酸存在下的过渡态  

Studies on the Hydrolytic polymerization of Ghromium(Ⅲ)Ion(Ⅷ)——The Transition Stage in the Presence of Fumaric Acid

作　　者：罗勤慧[1] 沈孟长[1] 丁益 屠庆云 Luo Qinhui;Shen Mengchang;Ding Yi;Tu Qinyun(Coordination Chemistry Research Institute,Nanjing University,Nanjing)

机构地区：[1]南京大学配位化学研究所

出　　处：《高等学校化学学报》1986年第11期969-974,共6页Chemical Journal of Chinese Universities

基　　金：中国科学院自然科学基金资助课题。

摘　　要：本文研究究了Cr(NO_(3))_(3)与四种浓度的反丁烯二酸共存时Cr^(3+)在水溶液中的聚合状态,采用LEMIT程序计算了在四种配体浓度下存在的同一粒子(离子或分子),其水解常数不但彼此吻合,且和高、低浓度区的结果一致。Hydrolytic polymerization of chromium(Ⅲ)in 0.005M Cr(NO_(3))_(3) aqueous solution in presence of fumaric acid of four different concentrations(0.0035,0.005,0.0075,0.01M)was studied.The results show that the state of chromium(Ⅲ)is guite complicated,and besides the species([Cr_(2)(OH)A]^(3+),[Cr_(2)(OH)A_(2)]^(+),[Cr(OH)A])which exist in high and low concentration regions,new species[Cr_(2)(OH)2A]^(2+)has also been found,so this region may be regarded as transition stage,The species in the transition stage would transform one to another as the concentration changes.It shows some analogy with the results presented previously.Such phenomenon is rarely observed in hydrolytic reaction of other metal ions.Hydrolysis constants are calculated by program LEMIT and values of identical species obtained in the different concentration regions of fumaric acid are in good agreement with each other and agree with those reported in the previous papers.

关 键 词：水解常数 过渡态 反丁烯二酸 低浓度区 聚合状态 配体浓度 水解聚合 水溶液 

分 类 号：O64[理学—物理化学]