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化学学报
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化学学报 ›› 1982, Vol. 40 ›› Issue (2): 125-133. 上一篇    下一篇

论文

Cr3+的水解聚合作用的研究Ⅰ.

罗勤慧, 沈孟长, 丁益, 戴安邦   

  1. 南京大学配位化学研究所
  • 投稿日期:1980-12-05 发布日期:2013-06-03
  • 通讯作者: 罗勤慧

STUDIES ON THE HYDROLYTIC POLYMERIZATION OF Cr3+ I.

LUO QIN-HUI, SHEN MENG-CHANG, DING YI, DAI AN-BANG(TAI AN-PANG)   

  1. Institute of Coordination Chemistry, University of Nanjing
  • Received:1980-12-05 Published:2013-06-03

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本文报道对水合Cr(Ⅲ)离子的聚合过程及其生成多核化合物进行研究的结果.配制几组硝酸铬溶液,使其中Cr(Ⅲ)离子浓度和pH值不同而离子强度相同.一般约需一个月始达平衡,然后测定其pH值.数据按“根+节”理论处理,结果表明溶液中生成一系列通式为Cr[Cr(OH)2]n(3+n)+的络合物,式中n=1,2和3.用曲线拟合法、投影带法、曲线外推法等三种方法计算,所得平衡常数Kn极为一致.

Hydrolytic polymerization of Cr3+ has been stndied.Several aeries of chromic nitrate solutions of different concentrations and pH at constant ionic strength were prepared and atndied pH-metrically after eqnilibrinm had established which nasally took about one month.The data were treated according to the "Core plus Links" theory.The results showed that a aeries of complexes of the formula Cr[Cr(OH)2]n(3+n)++were formed with n=1, 2 and 3.The formation constants Kn were csalaulated by three methods: curve fitting, projection strip and onrve extrapolation.Concordant values were obtained.