Polynuclear Sulfide, Polysulfides and Thiol Complexes in Anoxic Water

目前的许多研究都是为了了解 微量金属在缺氧水环境中的行为 这些 研究已经产生了对化学计量的精确数据的需要 和含还原硫的金属络合物的稳定性 配体。在许多情况下，现有的数据是不确定的， 量级。 在其他情况下，没有任何数据 (e.g.,多硫化物和脂肪族硫醇络合物 亲硫痕量金属）。 关于这些数据的一个主要问题是， 存在的问题是复合物是单核的还是多聚的， 核武器 以前的实验学家提出过这个问题， 没有回答它。误解多核复合物作为 单核细胞可以在化学预测中产生巨大的错误， 自然界中的行为。 一个计划，使基本措施- 我们需要有一个系统来回答这些问题。 铜和锌将是 大部分工作的重点，虽然一些研究铁将是 如果时间允许的话。 所有测量将在 250 C。 这些研究将建立在以前的工作， 实验室 他们将在破译中加入重要信息 金属在缺氧环境中的溶解度及其在 污染、废水处理和各种地球化学 问题

Much current research is directed toward understanding the behavior of trace metals in anoxic aquatic environments. These studies have created a need for accurate data on the stoichiometry and stability of metal complexes containing reduced sulfur ligands. Existing data in many cases are uncertain at the order of magnitude level. In other cases, no data whatever are available (e.g., polysulfide and aliphatic thiol complexes of most sulfophile trace metals). A major question about such data as do exist concerns whether the complexes are mononuclear or poly- nuclear. Previous experimentalists have raised this question but not answered it. Misinterpretation of polynuclear complexes as mononuclear can create immense errors in predictions of chemical behavior in nature. A program to make the fundamental measure- ments is needed to answer such questions. Copper and zinc will be the focus of most of the work, although some studies on Fe will be undertaken if time permits. All measurements will be made at 250C. These studies will build upon previous work in this laboratory. They will add significant information in deciphering metal solubility in anoxic environments with applications to pollution, waste water treatment and a variety of geochemical problems.