Synthesis and molecular structures of S-2-FcNHCOC6H4SH and [MIII(OEP)(S-2-FcNHCOC6H4)] (Fc = ferrocenyl, M = Fe, Ga): Electrochemical contributions of intramolecular SH⋯O C and NH⋯S hydrogen bonds
and its porphyrin-thiolate compounds, [MIII(OEP)(S-2-FcNHCOC6H4)] (M = Fe (2a), Ga (3a)) were synthesized and characterized by X-ray analysis, spectroscopic and electrochemical measurements. The corresponding 4-substituted derivatives (1b–3b) were also synthesized to estimate the contribution of substituent effects. The formation of intramolecular SH⋯OC or NH⋯S hydrogenbonds in solution was established
具有二茂铁部分的新型氧化还原活性硫醇盐配体S-2-FcNHCOC 6 H 4 SH(1a)及其卟啉硫醇盐化合物[M III(OEP)(S-2-FcNHCOC 6 H 4)]( M = Fe(2a),Ga(3a))合成并通过X射线分析,光谱和电化学测量进行表征。相应的4-取代的衍生物(1b – 3b)也被合成以估计取代基效应的贡献。溶液中分子内SH⋯OC或NH⋯S氢键的形成由1确定1 H NMR和IR光谱。发现氢键和π共轭对Fc和铁-卟啉部分的氧化还原电势的协同作用。
A Synthetic Analogue of the Active Site of Fe-Containing Nitrile Hydratase with Carboxamido N and Thiolato S as Donors: Synthesis, Structure, and Reactivities
作者:Juan C. Noveron、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ja001253v
日期:2001.4.1
As part of our work on models of the iron(III) site of Fe-containing nitrilehydratase, a designed ligand PyPSH(4) with two carboxamide and two thiolate donor groups has been synthesized. Reaction of (Et(4)N)[FeCl(4)] with the deprotonated form of the ligand in DMF affords the mononuclear iron(III) complex (Et(4)N)[Fe(III)(PyPS)] (1) in high yield. The iron(III) center is in a trigonal bipyramidal
Reactions of Synthetic [2Fe-2S] and [4Fe-4S] Clusters with Nitric Oxide and Nitrosothiols
作者:Todd C. Harrop、Zachary J. Tonzetich、Erwin Reisner、Stephen J. Lippard
DOI:10.1021/ja8054996
日期:2008.11.19
iron-sulfur cluster proteins results in degradation and breakdown of the cluster to generate dinitrosyl iron complexes (DNICs). In some cases the formation of DNICs from such cluster systems can lead to activation of a regulatory pathway or the loss of enzyme activity. In order to understand the basic chemistry underlying these processes, we have investigated the reactions of NO with synthetic [2Fe-2S] and
The [MoFe<sub>3</sub>S<sub>4</sub>]<sup>2+</sup> Oxidation State: Synthesis, Substitution Reactions, and Structures of Phosphine-Ligated Cubane-Type Clusters with the <i>S</i> = 2 Ground State
作者:Bin Xi、R. H. Holm
DOI:10.1021/ic200641k
日期:2011.7.4
This work is the first comprehensive study of the [MoFe3S4]2+ state, one conspicuous feature of which is its ability to bind hard and soft σ-donors and strong to weak π-acid ligands. (Tp = tris(pyrazolyl)hydroborate(1-))
簇 [(Tp)MoFe 3 S 4 (PEt 3 ) 3 ] 1+包含立方烷型 [MoFe 3 (μ 3 -S) 4 ] 2+还原核在铁位点发生容易的配体取代反应,导致广泛的单取代和双取代物种 [(Tp)MoFe 3 S 4 (PEt 3 ) 3– n L n ] 1– n,其中 L = 卤化物、N 3 –、PhS –、PhSe –、R 3 SiO –, 和 R 3 SiS –并且n = 1 和 2。报告了该集合的 10 个成员的结构。对于两个有代表性的集群,居里行为在 2-20 K 表示自旋五重奏基态。零场穆斯堡尔光谱由强度比为 2:1 的两个双峰组成。57 Fe 异构体位移与平均氧化态 Fe 3 2.33+一致,该平均氧化态来自混合价氧化态描述 [Mo 3+ Fe 3+ Fe 2+ 2 ] 的电子离域。[(Tp)MoFe 3 S 4 (PEt 3 ) 2 Cl] 与 (Me 3 Si)
Synthesis and Reactions of Cubane-Type Iron−Sulfur−Phosphine Clusters, Including Soluble Clusters of Nuclearities 8 and 16
作者:Hong-Cai Zhou、R. H. Holm
DOI:10.1021/ic020464t
日期:2003.1.1
monocubanes [Fe(4)S(4)(PR(3))(4)] (R = Pr(i), Cy, Bu(t); generated in solution). In turn, [Fe(4)S(4)(PPr(i)()(3))(3)(SSiPh(3))] and [Fe(4)S(4)(PPr(i)(3))(4)] can be transformed into the dicubanes [Fe(8)S(8)(PPr(i)()(3))(4)(SSiPh(3))(2)] and [Fe(8)S(8)(PPr(i)((3))(6)], respectively. Further, the tetracubanes [Fe(16)S(16)(PR(3))(8)] are also accessible from [Fe(4)S(4)(PR(3))(4)] under different conditions