Catalytic cyclization and competitive deactivation with Ru(P<sup>R</sup><sub>2</sub>N<sup>R′</sup><sub>2</sub>) complexes
作者:J. M. Stubbs、J.-P. J. Bow、R. J. Hazlehurst、J. M. Blacquiere
DOI:10.1039/c6dt03694e
日期:——
Cooperative ligands present the challenge of balancing productive catalytic cyclization with competitive deactivation.
配体协同作用面临着在促进催化环化反应和竞争性失活之间取得平衡的挑战。
Syntheses and Structural Characterizations of Iron(II) Complexes Containing Cyclic Diphosphine Ligands with Positioned Pendant Nitrogen Bases
作者:George M. Jacobsen、Richard K. Shoemaker、Michael J. McNevin、M. Rakowski DuBois、Daniel L. DuBois
DOI:10.1021/om700601h
日期:2007.9.1
(8). The molecular structures of 5, 6b, and 7 have been confirmed by X-ray diffraction studies. For all complexes the cyclic diphosphine ligands contain one six-membered ring in a chair conformation and one six-membered ring in a boat conformation. For complex 7, the two rings that are in boat conformations result in N−H distances between the pendant amine nitrogens and the hydride ligand of 2.6 to
合成并表征了一系列新的含环二膦配体和侧基胺碱P 2 R N 2 R '的铁(II)配合物(其中P 2 R N 2 R '被取代的1,5-diaza-3 ,7-二磷环辛烷)。这些化合物包括[Fe(P 2 Ph N 2 Ph)(CH 3 CN)4 ](BF 4)2(5),顺式-[Fe(P 2 Ph N 2 Ph)2(CH 3CN)2 ](BF 4)2(6a),顺式-[Fe(P 2 Ph N 2 Bz)2(CH 3 CN)2 ](BF 4)2(6b),顺式-[Fe(P 2 Cy N 2 Bz)2(CH 3 CN)2 ](BF 4)2(6c),反式-[HFe(P 2 Ph N 2 Ph)2(CH 3 CN)](BF 4)(7)和顺式-Fe(P 2 Ph N 2 Ph)2(Cl)2(8)。的分子结构5,图6b和7通过X射线衍射研究已得到了证实。对于所有配合物,环状二膦配体在椅子构象中均包含一个六元环
Evaluation of attractive interactions in the second coordination sphere of iron complexes containing pendant amines
作者:Qian Liao、Tianbiao Liu、Samantha I. Johnson、Christina M. Klug、Eric S. Wiedner、R. Morris Bullock、Daniel L. DuBois
DOI:10.1039/c9dt00708c
日期:——
the lone pair of electrons on the N atom than chloride ligands. Similarly, boat conformations are observed for both rings adjacent to the hydride ligands of trans-[HFe(PPh2NBn2)2(CH3CN)]+ and trans-HFe(PPh2NBn2)2Cl, resulting in short N⋯H distances. Spectroscopic and computational studies of trans-[HFe(PPh2NBn2)2(CO)]+, trans-[HFe(PPh2NBn2)(PPh2NBn2H)(CO)]2+, and trans-[HFe(PPh2NBn2)2(H2)]+ indicate the
在第一配位层中的第二配位球挂件胺和配体之间的相互作用是对于理解的结构和含P络合物的反应性重要ř 2 Ñ R' 2个配体,其已经被证明是非常有效H 2氧化/生产催化剂。制备了一系列[Fe(P Ph 2 N Bn 2)2(X)(Y)] n +配合物,并对其结构进行了表征。这些配合物具有两个不同的配体,二膦配体的侧基胺可与之相互作用。顺式-Fe(P Ph的固态结构2 N Bn 2) 2 Cl 2揭示与P原子相邻的六元环处于船形确认中,这导致N closeP距离很近,这表明P原子对电子上的孤对电子有更大的亲和力。 N原子比氯化物配体高。类似地,在与反式-[HFe(P Ph 2 N Bn 2) 2(CH 3 CN)] +和反式-HFe(P Ph 2 N Bn 2) 2的氢化物配体相邻的两个环中均观察到船形。Cl,导致较短的N⋯H距离。反式-[HFe(P Ph 2 N Bn 2)2(CO)] +,反式-[HFe(P
Synthesis, Characterization and Electrochemical Reductive Properties of Complexes [Fe
<sub>2</sub>
(CO)
<sub>4</sub>
(κ
<sup>2</sup>
‐P
<sup>Ph</sup>
<sub>2</sub>
N
<sup>R</sup>
<sub>2</sub>
)(
<i>µ</i>
‐dithiolato)] Related to the H‐Cluster of [FeFe]‐H
<sub>2</sub>
ases
作者:Ahmad Hobballah、Sondes Lounissi、Rachid Motei、Catherine Elleouet、François Y. Pétillon、Philippe Schollhammer
DOI:10.1002/ejic.202000824
日期:2021.1.22
A series of dithiolate carbonyl diironcomplexes with cyclic azadiphosphine, related to the activesite of [FeFe]‐hydrogenases, has been prepared. Several combinations of diphosphines and dithiolate bridges have been examined in order to obtain information on the influence of electronic and steric effects of the group linked to the nitrogen atom of the phosphine (phenyl or benzyl) and the bridge‐head
已经制备了一系列与 [FeFe]-氢化酶活性位点相关的具有环状氮杂二膦的二硫醇羰基二铁络合物。为了获得与膦(苯基或苄基)的氮原子和二硫醇桥头(CH2, CEt2、CBn2)。对产物进行光谱和结构表征。质子化实验表明,根据二膦中胺的性质,质子化过程是不同的。对于 NBn 基团,该过程在 N 质子化物种处被阻止,而对于 NPh,质子转移到二铁位点,产生桥连氢化物物种。二硫醇的桥头基团对化合物的电子性质的影响非常小。根据桥的空间拥挤,在溶液或固态中观察到与二膦的二基或基顶位置相关的不同异构体。进行电化学研究以检查这些化合物在酸存在下的活性。
Bis-chelate nickel(II) complex with a 1,5-diaza-3,7-diphosphacyclooctane ligand: Solid-state structure and redox properties
作者:Vera V. Khrizanforova、Robert R. Fayzullin、Sofia O. Strekalova、Andrey A. Karasik、Yulia H. Budnikova
DOI:10.1080/10426507.2018.1541240
日期:2019.5.27
Abstract The solid-state structure and redox properties of bis-chelate dibromide nickel(II) complex (1) with a 1,5-diaza-3,7-diphosphacyclooctane ligand (PPh2NBn2) was reported. Graphical Abstract
摘要 报道了具有 1,5-二氮杂-3,7-二磷杂环辛烷配体 (PPh2NBn2) 的双螯合二溴化镍 (II) 配合物 (1) 的固态结构和氧化还原性能。图形概要