Synthesis, structure, spectra and redox chemistry of iron(III) complexes of tridentate pyridyl and benzimidazolyl ligands
作者:Rathinam Viswanathan、Mallayan Palaniandavar、Thailampillai Balasubramanian、P. Thomas Muthiah
DOI:10.1039/dt9960002519
日期:——
octahedral 1 : 2 iron(III) complexes of Schiff bases derived from salicylaldehyde and aromatic amines and the 1 : 1 and 1 : 2 complexes of bis(pyridin-2-yl)-aza and bis(benzimidazol-2-yl)-aza and -thioether ligands have been isolated. The crystalstructure of trichloro[bis(pyridin-2-ylmethyl)amine]iron(III) has been determined. It contains two crystallographically independent molecules in the asymmetric
水杨醛和芳香胺衍生的席夫碱的一系列高自旋八面体1:2铁(III)配合物以及双(吡啶-2-基)-氮杂和双(苯并咪唑-已经分离出2-基)-氮杂和-硫醚配体。已经确定了三氯[双(吡啶-2-基甲基)胺]铁(III)的晶体结构。它在不对称晶胞中包含两个晶体学独立的分子。在每个分子中,铁(III)具有菱形扭曲的八面体配位,由面部配体的所有三个氮原子和三个氯离子组成。立体化学和/或供体原子变化对UV / VIS和EPR光谱以及Fe III –Fe II的影响讨论了氧化还原电势以及铁(III)中心的路易斯酸度。[FeL 1 2 ] Cl [HL 1 = N-(吡啶-2-基甲基)水杨基亚胺]的酚盐对铁(III)电荷转移带能更高,其Fe III -Fe II氧化还原电位比对应的1:1复合物的那些。
UV-Vis and EPR spectroscopic study of copper(II) complexes with bis(benzimidazol-2-yl) ligands
作者:Raffaele P. Bonomo、Enrico Rizzarelli、Mario Bressan、Antonio Morvillo
DOI:10.1016/s0020-1693(00)87925-6
日期:1991.8
Abstract Copper(II) complexes with bis(benzimidazol-2-yl) ligands of the type Bz(CH 2 ) n -X-(CH 2 ) n Bz (where Bz=benzimidazol-2-yl; XO, S or CH 2 ; n =1, 2) have been characterized in solution by UV-Vis and EPR spectroscopy. Mono complexes with O or S donor atom containing ligands have square-pyramidalstereochemistries, while biscomplexes have pseudo-octahedral geometries with four nitrogen donors
The reaction of a potentially N2S-donor bis[benzo(thiazole/imidazole)] with the fac-[Re(CO)3]+ and cis-[ReO2]+ cores
作者:T.I.A. Gerber、K.C. Potgieter、P. Mayer
DOI:10.1016/j.inoche.2011.04.002
日期:2011.7
The reactions of bis(benzothiazol-2-ylethyl)sulfide (bts) and its benzimidazole analogue (btn), both with a N 2 S-donor atom set, with [Re(CO) 5 Br] and cis -[ReO 2 I(PPh 3 ) 2 ] were studied. The X-ray crystal structure of fac -[Re(CO) 3 (bts)Br] shows that bts acts as a bidentate NS-donor ligand, with a free uncoordinated benzothiazole group. With rhenium(V) the dimer ( μ -O) 2 [Re 2 O 2 (btn) 2
双(苯并噻唑-2-基乙基)硫醚 (bts) 及其苯并咪唑类似物 (btn) 的反应,均具有 N 2 S-供体原子组,与 [Re(CO) 5 Br] 和顺式 -[ReO 2 I (PPh 3 ) 2 ] 进行了研究。fac -[Re(CO) 3 (bts)Br] 的 X 射线晶体结构表明 bts 作为双齿 NS 供体配体,具有游离的未配位苯并噻唑基团。使用铼(V) 分离出二聚体( μ -O) 2 [Re 2 O 2 (btn) 2 ]I 2 ,其中btn 作为与每个金属中心的三齿N 2 S 螯合物。每个氧桥不对称,Re-O 距离不等。
Synthesis, structure, spectra and redox of Cu(ii) complexes of chelating bis(benzimidazole)—thioether ligands as models for electron transfer blue copper proteinsDedicated to Professor P. Natarajan on the occasion of his sixtieth anniversary. Electronic supplementary information (ESI) available: Fig. S1 showing the preliminary X-ray structure of the [Cu(L3)]+ cation, Figs. S2, S4 and S5 showing the cyclic and differential pulse voltammograms of complexes 1a, 3 and 4 respectively and Fig. S3 showing the cyclic voltammograms of complexes 2a and 2b. See http://www.rsc.org/suppdata/dt/b1/b103511h/
nitrogens, one thioether sulfur and N-methyl substituted amine nitrogen atom with the other thioether sulfur atom coordinated axially. The coordination geometry is best described as trigonal bipyramidal distorted square based pyramidal (TBDSBP). The ligand field and EPR spectra of 1a, 2a and 2b are consistent with trigonal bipyramidal geometry in the solid state, whereas two ligand field bands in solution
该三齿配体1,5-双(苯并咪唑-2-基)-3- thiapentane(L 1)用N 2小号供体组形成络合物[铜(L 1)(H 2 O)CL]氯1A和线性具有N 2 S 2供体组的四齿配体1,8-双(苯并咪唑-2-基)-3,6-二硫辛烷(L 2)形成配合物[Cu(L 2)](ClO 4)2 ·2H 2 O 2a和[Cu(L 2)(NO 3)] NO 3 2b。线性五齿配体1,11-双(吡啶-2-基)-3,6,9-三硫杂十一烷(L 3),N2 S 3供体组形成复合物[Cu(L 3)](ClO 4) 2 3。五齿配体N,N-双(苯并咪唑-2-基甲硫基乙基)甲胺(L 4)与N 3 S 2供体组的高氯酸盐配合物[Cu(L 4)](ClO 4) 2 ·2CH 3 CN 4具有也被孤立了。在1a中, Cu( II)与配体L 1的两个苯并咪唑氮和硫醚硫配位,氯离子和水分子。铜周围的配位几何介于三角锥和方
Folic acid-mediated re-shuttling of ferritin receptor specificity towards a selective delivery of highly cytotoxic nickel(II) coordination compounds
Despite FRTNi can be internalized through passive targeting by enhanced permeability and retention effect, we further introduced active targeting utilizing folate receptor (FR) via folic acid (FA)-modified FRT (FRTNiFA). Using breast cell lines T-47D (FR+), MCF-7 (FR-) and non-malignant mammary gland derived cell line HBL-100 (FR-), we show pronounced FR-dependent internalization of FRTNiFA. Overall, we