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Synthesis and characterization of stable iron(IV), tin(IV) and ruthenium(IV) thiatrane complexes.

机译:稳定的铁(IV),锡(IV)和钌(IV)的硫杂环丁烷配合物的合成和表征。

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摘要

Iron(IV) is proposed to be a key oxidation state in many metalloenzymes that catalyze the selective oxidation of hydrocarbons and related compounds using oxygen. This work reports the designed synthesis of stable, diamagnetic, trigonal bipyramidai, iron(IV) thiatrane complexes starting from either iron(II) or iron(III). For example, the reaction of the tris-thiolate ligand, P(C 6H3-3-SiMe3-2-S)3, (PS3) TMS, (generated in situ from the H3PS3 TMS proligand and Et3N) with FeCl2 under a nitrogen atmosphere produced an emerald green solution which contained [FeII (PS3)TMS]. Laboratory workup of this compound produced an intensely purpled-colored complex, ClFe IV(PS3)TMS, which was the first diamagnetic iron(IV) complex and the first trigonal bipyramidal, iron(IV) thiatrane complex to be structurally characterized.; Utilizing this general procedure and a variety of tris-thiolate ligands, this dissertation focuses on the synthesis of complexes of the type XM IV(PS3). Eight additional iron(IV) and the isostructural tin(IV) and ruthenium(IV) complexes with formulas XFe(PS3) TMS where (PS3)TMS = P(C6H 3-3-Me3Si-2-S)3 and X = Br, I, CN, PhSn(PS3)TMS, PhSn(PS3)Me where (PS3)Me = P(C6H3-5-Me-2-S) 3, PhSn(PS3) where (PS3) = P(C6H 4-2-S)3, ClRu(PS3)TMS and ClRu(PS 3) have been synthesized. The mechanistic details for the formation of these stable complexes, the identification of metal and nonmetal-containing reaction coproducts and physical and chemical properties of these substances have been pursued.; Five of these complexes, BrFe(PS3)TMS, IFe(PS 3)TMS, PhSn(PS3)TMS, PhSn(PS 3)Me and PhSn(PS3) have been studied crystallographically. PhSn(PS3)TMS can be easily converted to either ClFe(PS 3)TMS or ClRu(PS3)TMS via transmetalation reactions using FeCl3, FeCl2, (Et4N) 2[Fe2OCl6] and RuCl2(DMSO)4. These reactions gave insight into the lability of the fifth coordination site (halogen, cyanide or phenyl) in the trigonal bipyramidal complexes as well as the reactivity of the metal centers. The chemical reactivity of CIFe(PS 3)TMS has been explored by using this iron(IV) complex as a reagent in the attempted formation of six-coordinate (Et2NCS 2)Fe(PS3)TMS.; Developing this chemistry and characterizing the resulting complexes provided the foundation needed to prepare a new group of functional and structural models for a wide range of metalloenzymes.
机译:铁(IV)被认为是许多金属酶中的关键氧化态,这些金属酶使用氧气催化碳氢化合物和相关化合物的选择性氧化。这项工作报告了从铁(II)或铁(III)开始的稳定,抗磁,三角双吡喃铁(IV)硫杂tra配合物的设计合成。例如,三硫醇盐配体P(C 6 H 3 -3-SiMe 3 -2-S)< sub> 3 ,(PS 3 TMS ,(由H 3 PS 3 原位生成sub> TMS 配体和Et 3 N)与FeCl 2 在氮气氛下产生了翡翠绿色溶液,其中含有[Fe II (PS 3 TMS ] -。该化合物的实验室处理产生了深紫色的复合物ClFe IV (PS 3 TMS ,这是第一批抗磁性铁(IV)。 )配合物和第一个三角双锥体铁(IV)硫杂环丁烷配合物要进行结构表征。利用该通用方法和多种三硫醇盐配体,本文重点研究了XM IV (PS 3 )型配合物的合成。分子式为XFe(PS 3 TMS 的另外八种铁(IV)以及同构锡(IV)和钌(IV)配合物,其中(PS 3 TMS = P(C 6 H 3 -3-Me 3 Si-2-S) 3 和X = Br,I,CN,PhSn(PS 3 TMS ,PhSn(PS 3 Me 其中(PS 3 Me = P(C 6 H 3 - 5-Me-2-S) 3 ,PhSn(PS 3 )其中(PS 3 )= P(C 6 < / sub> H 4 -2-S) 3 ,ClRu(PS 3 TMS 和ClRu(PS 3 )已合成。已经研究了形成这些稳定的配合物的机理细节,鉴定金属和非金属反应副产物以及这些物质的物理和化学性质。其中五个复合物BrFe(PS 3 TMS ,IFe(PS 3 TMS ,PhSn(PS 3 TMS ,PhSn(PS 3 Me 和PhSn(PS 3 )已进行了晶体学研究。 PhSn(PS 3 TMS 可以轻松转换为ClFe(PS 3 TMS 或ClRu(PS FeCl 3 ,FeCl 2 ,(Et 4 的金属转移反应通过 3 TMS > N) 2 [Fe 2 OCl 6 ]和RuCl 2 (DMSO) 4 。这些反应使人们了解了三角双锥体络合物中第五个配位点(卤素,氰化物或苯基)的不稳定性以及金属中心的反应性。以该铁(IV)配合物为试剂,尝试形成六配位(Et 3),探索了CIFe(PS 3 TMS 的化学反应性。 > 2 NCS 2 )Fe(PS 3 TMS 。开发这种化学反应和表征所得的配合物,为准备针对各种金属酶的一组新的功能和结构模型提供了基础。

著录项

  • 作者

    Fusie-Clark, Kerry Ann.;

  • 作者单位

    The University of Nebraska - Lincoln.;

  • 授予单位 The University of Nebraska - Lincoln.;
  • 学科 Chemistry Inorganic.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 282 p.
  • 总页数 282
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无机化学;
  • 关键词

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